diff --git a/funasr/bin/eend_ola_inference.py b/funasr/bin/eend_ola_inference.py
new file mode 100755
index 000000000..d65895f30
--- /dev/null
+++ b/funasr/bin/eend_ola_inference.py
@@ -0,0 +1,413 @@
+#!/usr/bin/env python3
+# Copyright FunASR (https://github.com/alibaba-damo-academy/FunASR). All Rights Reserved.
+#  MIT License  (https://opensource.org/licenses/MIT)
+
+import argparse
+import logging
+import os
+import sys
+from pathlib import Path
+from typing import Any
+from typing import List
+from typing import Optional
+from typing import Sequence
+from typing import Tuple
+from typing import Union
+
+import numpy as np
+import torch
+from typeguard import check_argument_types
+
+from funasr.models.frontend.wav_frontend import WavFrontendMel23
+from funasr.tasks.diar import EENDOLADiarTask
+from funasr.torch_utils.device_funcs import to_device
+from funasr.utils import config_argparse
+from funasr.utils.cli_utils import get_commandline_args
+from funasr.utils.types import str2bool
+from funasr.utils.types import str2triple_str
+from funasr.utils.types import str_or_none
+
+
+class Speech2Diarization:
+    """Speech2Diarlization class
+
+    Examples:
+        >>> import soundfile
+        >>> import numpy as np
+        >>> speech2diar = Speech2Diarization("diar_sond_config.yml", "diar_sond.pth")
+        >>> profile = np.load("profiles.npy")
+        >>> audio, rate = soundfile.read("speech.wav")
+        >>> speech2diar(audio, profile)
+        {"spk1": [(int, int), ...], ...}
+
+    """
+
+    def __init__(
+            self,
+            diar_train_config: Union[Path, str] = None,
+            diar_model_file: Union[Path, str] = None,
+            device: str = "cpu",
+            dtype: str = "float32",
+    ):
+        assert check_argument_types()
+
+        # 1. Build Diarization model
+        diar_model, diar_train_args = EENDOLADiarTask.build_model_from_file(
+            config_file=diar_train_config,
+            model_file=diar_model_file,
+            device=device
+        )
+        frontend = None
+        if diar_train_args.frontend is not None and diar_train_args.frontend_conf is not None:
+            frontend = WavFrontendMel23(**diar_train_args.frontend_conf)
+
+        # set up seed for eda
+        np.random.seed(diar_train_args.seed)
+        torch.manual_seed(diar_train_args.seed)
+        torch.cuda.manual_seed(diar_train_args.seed)
+        os.environ['PYTORCH_SEED'] = str(diar_train_args.seed)
+        logging.info("diar_model: {}".format(diar_model))
+        logging.info("diar_train_args: {}".format(diar_train_args))
+        diar_model.to(dtype=getattr(torch, dtype)).eval()
+
+        self.diar_model = diar_model
+        self.diar_train_args = diar_train_args
+        self.device = device
+        self.dtype = dtype
+        self.frontend = frontend
+
+    @torch.no_grad()
+    def __call__(
+            self,
+            speech: Union[torch.Tensor, np.ndarray],
+            speech_lengths: Union[torch.Tensor, np.ndarray] = None
+    ):
+        """Inference
+
+        Args:
+            speech: Input speech data
+        Returns:
+            diarization results
+
+        """
+        assert check_argument_types()
+        # Input as audio signal
+        if isinstance(speech, np.ndarray):
+            speech = torch.tensor(speech)
+
+        if self.frontend is not None:
+            feats, feats_len = self.frontend.forward(speech, speech_lengths)
+            feats = to_device(feats, device=self.device)
+            feats_len = feats_len.int()
+            self.diar_model.frontend = None
+        else:
+            feats = speech
+            feats_len = speech_lengths
+        batch = {"speech": feats, "speech_lengths": feats_len}
+        batch = to_device(batch, device=self.device)
+        results = self.diar_model.estimate_sequential(**batch)
+
+        return results
+
+    @staticmethod
+    def from_pretrained(
+            model_tag: Optional[str] = None,
+            **kwargs: Optional[Any],
+    ):
+        """Build Speech2Diarization instance from the pretrained model.
+
+        Args:
+            model_tag (Optional[str]): Model tag of the pretrained models.
+                Currently, the tags of espnet_model_zoo are supported.
+
+        Returns:
+            Speech2Diarization: Speech2Diarization instance.
+
+        """
+        if model_tag is not None:
+            try:
+                from espnet_model_zoo.downloader import ModelDownloader
+
+            except ImportError:
+                logging.error(
+                    "`espnet_model_zoo` is not installed. "
+                    "Please install via `pip install -U espnet_model_zoo`."
+                )
+                raise
+            d = ModelDownloader()
+            kwargs.update(**d.download_and_unpack(model_tag))
+
+        return Speech2Diarization(**kwargs)
+
+
+def inference_modelscope(
+        diar_train_config: str,
+        diar_model_file: str,
+        output_dir: Optional[str] = None,
+        batch_size: int = 1,
+        dtype: str = "float32",
+        ngpu: int = 0,
+        num_workers: int = 0,
+        log_level: Union[int, str] = "INFO",
+        key_file: Optional[str] = None,
+        model_tag: Optional[str] = None,
+        allow_variable_data_keys: bool = True,
+        streaming: bool = False,
+        param_dict: Optional[dict] = None,
+        **kwargs,
+):
+    assert check_argument_types()
+    if batch_size > 1:
+        raise NotImplementedError("batch decoding is not implemented")
+    if ngpu > 1:
+        raise NotImplementedError("only single GPU decoding is supported")
+
+    logging.basicConfig(
+        level=log_level,
+        format="%(asctime)s (%(module)s:%(lineno)d) %(levelname)s: %(message)s",
+    )
+    logging.info("param_dict: {}".format(param_dict))
+
+    if ngpu >= 1 and torch.cuda.is_available():
+        device = "cuda"
+    else:
+        device = "cpu"
+
+    # 1. Build speech2diar
+    speech2diar_kwargs = dict(
+        diar_train_config=diar_train_config,
+        diar_model_file=diar_model_file,
+        device=device,
+        dtype=dtype,
+        streaming=streaming,
+    )
+    logging.info("speech2diarization_kwargs: {}".format(speech2diar_kwargs))
+    speech2diar = Speech2Diarization.from_pretrained(
+        model_tag=model_tag,
+        **speech2diar_kwargs,
+    )
+    speech2diar.diar_model.eval()
+
+    def output_results_str(results: dict, uttid: str):
+        rst = []
+        mid = uttid.rsplit("-", 1)[0]
+        for key in results:
+            results[key] = [(x[0] / 100, x[1] / 100) for x in results[key]]
+        template = "SPEAKER {} 0 {:.2f} {:.2f} <NA> <NA> {} <NA> <NA>"
+        for spk, segs in results.items():
+            rst.extend([template.format(mid, st, ed, spk) for st, ed in segs])
+
+        return "\n".join(rst)
+
+    def _forward(
+            data_path_and_name_and_type: Sequence[Tuple[str, str, str]] = None,
+            raw_inputs: List[List[Union[np.ndarray, torch.Tensor, str, bytes]]] = None,
+            output_dir_v2: Optional[str] = None,
+            param_dict: Optional[dict] = None,
+    ):
+        # 2. Build data-iterator
+        if data_path_and_name_and_type is None and raw_inputs is not None:
+            if isinstance(raw_inputs, torch.Tensor):
+                raw_inputs = raw_inputs.numpy()
+            data_path_and_name_and_type = [raw_inputs, "speech", "waveform"]
+        loader = EENDOLADiarTask.build_streaming_iterator(
+            data_path_and_name_and_type,
+            dtype=dtype,
+            batch_size=batch_size,
+            key_file=key_file,
+            num_workers=num_workers,
+            preprocess_fn=EENDOLADiarTask.build_preprocess_fn(speech2diar.diar_train_args, False),
+            collate_fn=EENDOLADiarTask.build_collate_fn(speech2diar.diar_train_args, False),
+            allow_variable_data_keys=allow_variable_data_keys,
+            inference=True,
+        )
+
+        # 3. Start for-loop
+        output_path = output_dir_v2 if output_dir_v2 is not None else output_dir
+        if output_path is not None:
+            os.makedirs(output_path, exist_ok=True)
+            output_writer = open("{}/result.txt".format(output_path), "w")
+        result_list = []
+        for keys, batch in loader:
+            assert isinstance(batch, dict), type(batch)
+            assert all(isinstance(s, str) for s in keys), keys
+            _bs = len(next(iter(batch.values())))
+            assert len(keys) == _bs, f"{len(keys)} != {_bs}"
+            # batch = {k: v[0] for k, v in batch.items() if not k.endswith("_lengths")}
+
+            results = speech2diar(**batch)
+            # Only supporting batch_size==1
+            key, value = keys[0], output_results_str(results, keys[0])
+            item = {"key": key, "value": value}
+            result_list.append(item)
+            if output_path is not None:
+                output_writer.write(value)
+                output_writer.flush()
+
+        if output_path is not None:
+            output_writer.close()
+
+        return result_list
+
+    return _forward
+
+
+def inference(
+        data_path_and_name_and_type: Sequence[Tuple[str, str, str]],
+        diar_train_config: Optional[str],
+        diar_model_file: Optional[str],
+        output_dir: Optional[str] = None,
+        batch_size: int = 1,
+        dtype: str = "float32",
+        ngpu: int = 0,
+        seed: int = 0,
+        num_workers: int = 1,
+        log_level: Union[int, str] = "INFO",
+        key_file: Optional[str] = None,
+        model_tag: Optional[str] = None,
+        allow_variable_data_keys: bool = True,
+        streaming: bool = False,
+        smooth_size: int = 83,
+        dur_threshold: int = 10,
+        out_format: str = "vad",
+        **kwargs,
+):
+    inference_pipeline = inference_modelscope(
+        diar_train_config=diar_train_config,
+        diar_model_file=diar_model_file,
+        output_dir=output_dir,
+        batch_size=batch_size,
+        dtype=dtype,
+        ngpu=ngpu,
+        seed=seed,
+        num_workers=num_workers,
+        log_level=log_level,
+        key_file=key_file,
+        model_tag=model_tag,
+        allow_variable_data_keys=allow_variable_data_keys,
+        streaming=streaming,
+        smooth_size=smooth_size,
+        dur_threshold=dur_threshold,
+        out_format=out_format,
+        **kwargs,
+    )
+
+    return inference_pipeline(data_path_and_name_and_type, raw_inputs=None)
+
+
+def get_parser():
+    parser = config_argparse.ArgumentParser(
+        description="Speaker verification/x-vector extraction",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+
+    # Note(kamo): Use '_' instead of '-' as separator.
+    # '-' is confusing if written in yaml.
+    parser.add_argument(
+        "--log_level",
+        type=lambda x: x.upper(),
+        default="INFO",
+        choices=("CRITICAL", "ERROR", "WARNING", "INFO", "DEBUG", "NOTSET"),
+        help="The verbose level of logging",
+    )
+
+    parser.add_argument("--output_dir", type=str, required=False)
+    parser.add_argument(
+        "--ngpu",
+        type=int,
+        default=0,
+        help="The number of gpus. 0 indicates CPU mode",
+    )
+    parser.add_argument(
+        "--gpuid_list",
+        type=str,
+        default="",
+        help="The visible gpus",
+    )
+    parser.add_argument("--seed", type=int, default=0, help="Random seed")
+    parser.add_argument(
+        "--dtype",
+        default="float32",
+        choices=["float16", "float32", "float64"],
+        help="Data type",
+    )
+    parser.add_argument(
+        "--num_workers",
+        type=int,
+        default=1,
+        help="The number of workers used for DataLoader",
+    )
+
+    group = parser.add_argument_group("Input data related")
+    group.add_argument(
+        "--data_path_and_name_and_type",
+        type=str2triple_str,
+        required=False,
+        action="append",
+    )
+    group.add_argument("--key_file", type=str_or_none)
+    group.add_argument("--allow_variable_data_keys", type=str2bool, default=False)
+
+    group = parser.add_argument_group("The model configuration related")
+    group.add_argument(
+        "--diar_train_config",
+        type=str,
+        help="diarization training configuration",
+    )
+    group.add_argument(
+        "--diar_model_file",
+        type=str,
+        help="diarization model parameter file",
+    )
+    group.add_argument(
+        "--dur_threshold",
+        type=int,
+        default=10,
+        help="The threshold for short segments in number frames"
+    )
+    parser.add_argument(
+        "--smooth_size",
+        type=int,
+        default=83,
+        help="The smoothing window length in number frames"
+    )
+    group.add_argument(
+        "--model_tag",
+        type=str,
+        help="Pretrained model tag. If specify this option, *_train_config and "
+             "*_file will be overwritten",
+    )
+    parser.add_argument(
+        "--batch_size",
+        type=int,
+        default=1,
+        help="The batch size for inference",
+    )
+    parser.add_argument("--streaming", type=str2bool, default=False)
+
+    return parser
+
+
+def main(cmd=None):
+    print(get_commandline_args(), file=sys.stderr)
+    parser = get_parser()
+    args = parser.parse_args(cmd)
+    kwargs = vars(args)
+    kwargs.pop("config", None)
+    logging.info("args: {}".format(kwargs))
+    if args.output_dir is None:
+        jobid, n_gpu = 1, 1
+        gpuid = args.gpuid_list.split(",")[jobid - 1]
+    else:
+        jobid = int(args.output_dir.split(".")[-1])
+        n_gpu = len(args.gpuid_list.split(","))
+        gpuid = args.gpuid_list.split(",")[(jobid - 1) % n_gpu]
+    os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
+    os.environ["CUDA_VISIBLE_DEVICES"] = gpuid
+    results_list = inference(**kwargs)
+    for results in results_list:
+        print("{} {}".format(results["key"], results["value"]))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/funasr/models/e2e_diar_eend_ola.py b/funasr/models/e2e_diar_eend_ola.py
new file mode 100644
index 000000000..f589269c5
--- /dev/null
+++ b/funasr/models/e2e_diar_eend_ola.py
@@ -0,0 +1,242 @@
+# Copyright ESPnet (https://github.com/espnet/espnet). All Rights Reserved.
+#  Apache 2.0  (http://www.apache.org/licenses/LICENSE-2.0)
+
+from contextlib import contextmanager
+from distutils.version import LooseVersion
+from typing import Dict
+from typing import Tuple
+
+import numpy as np
+import torch
+import torch.nn as  nn
+from typeguard import check_argument_types
+
+from funasr.models.frontend.wav_frontend import WavFrontendMel23
+from funasr.modules.eend_ola.encoder import EENDOLATransformerEncoder
+from funasr.modules.eend_ola.encoder_decoder_attractor import EncoderDecoderAttractor
+from funasr.modules.eend_ola.utils.power import generate_mapping_dict
+from funasr.torch_utils.device_funcs import force_gatherable
+from funasr.train.abs_espnet_model import AbsESPnetModel
+
+if LooseVersion(torch.__version__) >= LooseVersion("1.6.0"):
+    pass
+else:
+    # Nothing to do if torch<1.6.0
+    @contextmanager
+    def autocast(enabled=True):
+        yield
+
+
+def pad_attractor(att, max_n_speakers):
+    C, D = att.shape
+    if C < max_n_speakers:
+        att = torch.cat([att, torch.zeros(max_n_speakers - C, D).to(torch.float32).to(att.device)], dim=0)
+    return att
+
+
+class DiarEENDOLAModel(AbsESPnetModel):
+    """EEND-OLA diarization model"""
+
+    def __init__(
+            self,
+            frontend: WavFrontendMel23,
+            encoder: EENDOLATransformerEncoder,
+            encoder_decoder_attractor: EncoderDecoderAttractor,
+            n_units: int = 256,
+            max_n_speaker: int = 8,
+            attractor_loss_weight: float = 1.0,
+            mapping_dict=None,
+            **kwargs,
+    ):
+        assert check_argument_types()
+
+        super().__init__()
+        self.frontend = frontend
+        self.encoder = encoder
+        self.encoder_decoder_attractor = encoder_decoder_attractor
+        self.attractor_loss_weight = attractor_loss_weight
+        self.max_n_speaker = max_n_speaker
+        if mapping_dict is None:
+            mapping_dict = generate_mapping_dict(max_speaker_num=self.max_n_speaker)
+            self.mapping_dict = mapping_dict
+        # PostNet
+        self.PostNet = nn.LSTM(self.max_n_speaker, n_units, 1, batch_first=True)
+        self.output_layer = nn.Linear(n_units, mapping_dict['oov'] + 1)
+
+    def forward_encoder(self, xs, ilens):
+        xs = nn.utils.rnn.pad_sequence(xs, batch_first=True, padding_value=-1)
+        pad_shape = xs.shape
+        xs_mask = [torch.ones(ilen).to(xs.device) for ilen in ilens]
+        xs_mask = torch.nn.utils.rnn.pad_sequence(xs_mask, batch_first=True, padding_value=0).unsqueeze(-2)
+        emb = self.encoder(xs, xs_mask)
+        emb = torch.split(emb.view(pad_shape[0], pad_shape[1], -1), 1, dim=0)
+        emb = [e[0][:ilen] for e, ilen in zip(emb, ilens)]
+        return emb
+
+    def forward_post_net(self, logits, ilens):
+        maxlen = torch.max(ilens).to(torch.int).item()
+        logits = nn.utils.rnn.pad_sequence(logits, batch_first=True, padding_value=-1)
+        logits = nn.utils.rnn.pack_padded_sequence(logits, ilens, batch_first=True, enforce_sorted=False)
+        outputs, (_, _) = self.PostNet(logits)
+        outputs = nn.utils.rnn.pad_packed_sequence(outputs, batch_first=True, padding_value=-1, total_length=maxlen)[0]
+        outputs = [output[:ilens[i].to(torch.int).item()] for i, output in enumerate(outputs)]
+        outputs = [self.output_layer(output) for output in outputs]
+        return outputs
+
+    def forward(
+            self,
+            speech: torch.Tensor,
+            speech_lengths: torch.Tensor,
+            text: torch.Tensor,
+            text_lengths: torch.Tensor,
+    ) -> Tuple[torch.Tensor, Dict[str, torch.Tensor], torch.Tensor]:
+        """Frontend + Encoder + Decoder + Calc loss
+
+        Args:
+            speech: (Batch, Length, ...)
+            speech_lengths: (Batch, )
+            text: (Batch, Length)
+            text_lengths: (Batch,)
+        """
+        assert text_lengths.dim() == 1, text_lengths.shape
+        # Check that batch_size is unified
+        assert (
+                speech.shape[0]
+                == speech_lengths.shape[0]
+                == text.shape[0]
+                == text_lengths.shape[0]
+        ), (speech.shape, speech_lengths.shape, text.shape, text_lengths.shape)
+        batch_size = speech.shape[0]
+
+        # for data-parallel
+        text = text[:, : text_lengths.max()]
+
+        # 1. Encoder
+        encoder_out, encoder_out_lens = self.encode(speech, speech_lengths)
+        intermediate_outs = None
+        if isinstance(encoder_out, tuple):
+            intermediate_outs = encoder_out[1]
+            encoder_out = encoder_out[0]
+
+        loss_att, acc_att, cer_att, wer_att = None, None, None, None
+        loss_ctc, cer_ctc = None, None
+        stats = dict()
+
+        # 1. CTC branch
+        if self.ctc_weight != 0.0:
+            loss_ctc, cer_ctc = self._calc_ctc_loss(
+                encoder_out, encoder_out_lens, text, text_lengths
+            )
+
+            # Collect CTC branch stats
+            stats["loss_ctc"] = loss_ctc.detach() if loss_ctc is not None else None
+            stats["cer_ctc"] = cer_ctc
+
+        # Intermediate CTC (optional)
+        loss_interctc = 0.0
+        if self.interctc_weight != 0.0 and intermediate_outs is not None:
+            for layer_idx, intermediate_out in intermediate_outs:
+                # we assume intermediate_out has the same length & padding
+                # as those of encoder_out
+                loss_ic, cer_ic = self._calc_ctc_loss(
+                    intermediate_out, encoder_out_lens, text, text_lengths
+                )
+                loss_interctc = loss_interctc + loss_ic
+
+                # Collect Intermedaite CTC stats
+                stats["loss_interctc_layer{}".format(layer_idx)] = (
+                    loss_ic.detach() if loss_ic is not None else None
+                )
+                stats["cer_interctc_layer{}".format(layer_idx)] = cer_ic
+
+            loss_interctc = loss_interctc / len(intermediate_outs)
+
+            # calculate whole encoder loss
+            loss_ctc = (
+                               1 - self.interctc_weight
+                       ) * loss_ctc + self.interctc_weight * loss_interctc
+
+        # 2b. Attention decoder branch
+        if self.ctc_weight != 1.0:
+            loss_att, acc_att, cer_att, wer_att = self._calc_att_loss(
+                encoder_out, encoder_out_lens, text, text_lengths
+            )
+
+        # 3. CTC-Att loss definition
+        if self.ctc_weight == 0.0:
+            loss = loss_att
+        elif self.ctc_weight == 1.0:
+            loss = loss_ctc
+        else:
+            loss = self.ctc_weight * loss_ctc + (1 - self.ctc_weight) * loss_att
+
+        # Collect Attn branch stats
+        stats["loss_att"] = loss_att.detach() if loss_att is not None else None
+        stats["acc"] = acc_att
+        stats["cer"] = cer_att
+        stats["wer"] = wer_att
+
+        # Collect total loss stats
+        stats["loss"] = torch.clone(loss.detach())
+
+        # force_gatherable: to-device and to-tensor if scalar for DataParallel
+        loss, stats, weight = force_gatherable((loss, stats, batch_size), loss.device)
+        return loss, stats, weight
+
+    def estimate_sequential(self,
+                            speech: torch.Tensor,
+                            speech_lengths: torch.Tensor,
+                            n_speakers: int = None,
+                            shuffle: bool = True,
+                            threshold: float = 0.5,
+                            **kwargs):
+        if self.frontend is not None:
+            speech = self.frontend(speech)
+        speech = [s[:s_len] for s, s_len in zip(speech, speech_lengths)]
+        emb = self.forward_encoder(speech, speech_lengths)
+        if shuffle:
+            orders = [np.arange(e.shape[0]) for e in emb]
+            for order in orders:
+                np.random.shuffle(order)
+            attractors, probs = self.encoder_decoder_attractor.estimate(
+                [e[torch.from_numpy(order).to(torch.long).to(speech[0].device)] for e, order in zip(emb, orders)])
+        else:
+            attractors, probs = self.encoder_decoder_attractor.estimate(emb)
+        attractors_active = []
+        for p, att, e in zip(probs, attractors, emb):
+            if n_speakers and n_speakers >= 0:
+                att = att[:n_speakers, ]
+                attractors_active.append(att)
+            elif threshold is not None:
+                silence = torch.nonzero(p < threshold)[0]
+                n_spk = silence[0] if silence.size else None
+                att = att[:n_spk, ]
+                attractors_active.append(att)
+            else:
+                NotImplementedError('n_speakers or threshold has to be given.')
+        raw_n_speakers = [att.shape[0] for att in attractors_active]
+        attractors = [
+            pad_attractor(att, self.max_n_speaker) if att.shape[0] <= self.max_n_speaker else att[:self.max_n_speaker]
+            for att in attractors_active]
+        ys = [torch.matmul(e, att.permute(1, 0)) for e, att in zip(emb, attractors)]
+        logits = self.forward_post_net(ys, speech_lengths)
+        ys = [self.recover_y_from_powerlabel(logit, raw_n_speaker) for logit, raw_n_speaker in
+              zip(logits, raw_n_speakers)]
+
+        return ys, emb, attractors, raw_n_speakers
+
+    def recover_y_from_powerlabel(self, logit, n_speaker):
+        pred = torch.argmax(torch.softmax(logit, dim=-1), dim=-1)
+        oov_index = torch.where(pred == self.mapping_dict['oov'])[0]
+        for i in oov_index:
+            if i > 0:
+                pred[i] = pred[i - 1]
+            else:
+                pred[i] = 0
+        pred = [self.reporter.inv_mapping_func(i, self.mapping_dict) for i in pred]
+        decisions = [bin(num)[2:].zfill(self.max_n_speaker)[::-1] for num in pred]
+        decisions = torch.from_numpy(
+            np.stack([np.array([int(i) for i in dec]) for dec in decisions], axis=0)).to(logit.device).to(
+            torch.float32)
+        decisions = decisions[:, :n_speaker]
+        return decisions
diff --git a/funasr/models/frontend/eend_ola_feature.py b/funasr/models/frontend/eend_ola_feature.py
new file mode 100644
index 000000000..e15b71c25
--- /dev/null
+++ b/funasr/models/frontend/eend_ola_feature.py
@@ -0,0 +1,51 @@
+# Copyright 2019 Hitachi, Ltd. (author: Yusuke Fujita)
+# Licensed under the MIT license.
+#
+# This module is for computing audio features
+
+import librosa
+import numpy as np
+
+
+def transform(Y, dtype=np.float32):
+    Y = np.abs(Y)
+    n_fft = 2 * (Y.shape[1] - 1)
+    sr = 8000
+    n_mels = 23
+    mel_basis = librosa.filters.mel(sr, n_fft, n_mels)
+    Y = np.dot(Y ** 2, mel_basis.T)
+    Y = np.log10(np.maximum(Y, 1e-10))
+    mean = np.mean(Y, axis=0)
+    Y = Y - mean
+    return Y.astype(dtype)
+
+
+def subsample(Y, T, subsampling=1):
+    Y_ss = Y[::subsampling]
+    T_ss = T[::subsampling]
+    return Y_ss, T_ss
+
+
+def splice(Y, context_size=0):
+    Y_pad = np.pad(
+        Y,
+        [(context_size, context_size), (0, 0)],
+        'constant')
+    Y_spliced = np.lib.stride_tricks.as_strided(
+        np.ascontiguousarray(Y_pad),
+        (Y.shape[0], Y.shape[1] * (2 * context_size + 1)),
+        (Y.itemsize * Y.shape[1], Y.itemsize), writeable=False)
+    return Y_spliced
+
+
+def stft(
+        data,
+        frame_size=1024,
+        frame_shift=256):
+    fft_size = 1 << (frame_size - 1).bit_length()
+    if len(data) % frame_shift == 0:
+        return librosa.stft(data, n_fft=fft_size, win_length=frame_size,
+                            hop_length=frame_shift).T[:-1]
+    else:
+        return librosa.stft(data, n_fft=fft_size, win_length=frame_size,
+                            hop_length=frame_shift).T
\ No newline at end of file
diff --git a/funasr/modules/eend_ola/encoder.py b/funasr/modules/eend_ola/encoder.py
index 17d11ace7..4999031b1 100644
--- a/funasr/modules/eend_ola/encoder.py
+++ b/funasr/modules/eend_ola/encoder.py
@@ -1,5 +1,5 @@
 import math
-import numpy as np
+
 import torch
 import torch.nn.functional as F
 from torch import nn
@@ -81,10 +81,16 @@ class PositionalEncoding(torch.nn.Module):
         return self.dropout(x)
 
 
-class TransformerEncoder(nn.Module):
-    def __init__(self, idim, n_layers, n_units,
-                 e_units=2048, h=8, dropout_rate=0.1, use_pos_emb=False):
-        super(TransformerEncoder, self).__init__()
+class EENDOLATransformerEncoder(nn.Module):
+    def __init__(self,
+                 idim: int,
+                 n_layers: int,
+                 n_units: int,
+                 e_units: int = 2048,
+                 h: int = 8,
+                 dropout_rate: float = 0.1,
+                 use_pos_emb: bool = False):
+        super(EENDOLATransformerEncoder, self).__init__()
         self.lnorm_in = nn.LayerNorm(n_units)
         self.n_layers = n_layers
         self.dropout = nn.Dropout(dropout_rate)
diff --git a/funasr/tasks/diar.py b/funasr/tasks/diar.py
index e699dccb0..ae7ee9b40 100644
--- a/funasr/tasks/diar.py
+++ b/funasr/tasks/diar.py
@@ -20,19 +20,19 @@ from funasr.datasets.collate_fn import CommonCollateFn
 from funasr.datasets.preprocessor import CommonPreprocessor
 from funasr.layers.abs_normalize import AbsNormalize
 from funasr.layers.global_mvn import GlobalMVN
-from funasr.layers.utterance_mvn import UtteranceMVN
 from funasr.layers.label_aggregation import LabelAggregate
-from funasr.models.ctc import CTC
-from funasr.models.encoder.resnet34_encoder import ResNet34Diar, ResNet34SpL2RegDiar
-from funasr.models.encoder.ecapa_tdnn_encoder import ECAPA_TDNN
-from funasr.models.encoder.opennmt_encoders.conv_encoder import ConvEncoder
-from funasr.models.encoder.opennmt_encoders.fsmn_encoder import FsmnEncoder
-from funasr.models.encoder.opennmt_encoders.self_attention_encoder import SelfAttentionEncoder
-from funasr.models.encoder.opennmt_encoders.ci_scorers import DotScorer, CosScorer
+from funasr.layers.utterance_mvn import UtteranceMVN
 from funasr.models.e2e_diar_sond import DiarSondModel
+from funasr.models.e2e_diar_eend_ola import DiarEENDOLAModel
 from funasr.models.encoder.abs_encoder import AbsEncoder
 from funasr.models.encoder.conformer_encoder import ConformerEncoder
 from funasr.models.encoder.data2vec_encoder import Data2VecEncoder
+from funasr.models.encoder.ecapa_tdnn_encoder import ECAPA_TDNN
+from funasr.models.encoder.opennmt_encoders.ci_scorers import DotScorer, CosScorer
+from funasr.models.encoder.opennmt_encoders.conv_encoder import ConvEncoder
+from funasr.models.encoder.opennmt_encoders.fsmn_encoder import FsmnEncoder
+from funasr.models.encoder.opennmt_encoders.self_attention_encoder import SelfAttentionEncoder
+from funasr.models.encoder.resnet34_encoder import ResNet34Diar, ResNet34SpL2RegDiar
 from funasr.models.encoder.rnn_encoder import RNNEncoder
 from funasr.models.encoder.sanm_encoder import SANMEncoder, SANMEncoderChunkOpt
 from funasr.models.encoder.transformer_encoder import TransformerEncoder
@@ -41,17 +41,13 @@ from funasr.models.frontend.default import DefaultFrontend
 from funasr.models.frontend.fused import FusedFrontends
 from funasr.models.frontend.s3prl import S3prlFrontend
 from funasr.models.frontend.wav_frontend import WavFrontend
+from funasr.models.frontend.wav_frontend import WavFrontendMel23
 from funasr.models.frontend.windowing import SlidingWindow
-from funasr.models.postencoder.abs_postencoder import AbsPostEncoder
-from funasr.models.postencoder.hugging_face_transformers_postencoder import (
-    HuggingFaceTransformersPostEncoder,  # noqa: H301
-)
-from funasr.models.preencoder.abs_preencoder import AbsPreEncoder
-from funasr.models.preencoder.linear import LinearProjection
-from funasr.models.preencoder.sinc import LightweightSincConvs
 from funasr.models.specaug.abs_specaug import AbsSpecAug
 from funasr.models.specaug.specaug import SpecAug
 from funasr.models.specaug.specaug import SpecAugLFR
+from funasr.modules.eend_ola.encoder import EENDOLATransformerEncoder
+from funasr.modules.eend_ola.encoder_decoder_attractor import EncoderDecoderAttractor
 from funasr.tasks.abs_task import AbsTask
 from funasr.torch_utils.initialize import initialize
 from funasr.train.abs_espnet_model import AbsESPnetModel
@@ -70,6 +66,7 @@ frontend_choices = ClassChoices(
         s3prl=S3prlFrontend,
         fused=FusedFrontends,
         wav_frontend=WavFrontend,
+        wav_frontend_mel23=WavFrontendMel23,
     ),
     type_check=AbsFrontend,
     default="default",
@@ -107,6 +104,7 @@ model_choices = ClassChoices(
     "model",
     classes=dict(
         sond=DiarSondModel,
+        eend_ola=DiarEENDOLAModel,
     ),
     type_check=AbsESPnetModel,
     default="sond",
@@ -126,6 +124,7 @@ encoder_choices = ClassChoices(
         sanm_chunk_opt=SANMEncoderChunkOpt,
         data2vec_encoder=Data2VecEncoder,
         ecapa_tdnn=ECAPA_TDNN,
+        eend_ola_transformer=EENDOLATransformerEncoder,
     ),
     type_check=torch.nn.Module,
     default="resnet34",
@@ -177,6 +176,15 @@ decoder_choices = ClassChoices(
     type_check=torch.nn.Module,
     default="fsmn",
 )
+# encoder_decoder_attractor is used for EEND-OLA
+encoder_decoder_attractor_choices = ClassChoices(
+    "encoder_decoder_attractor",
+    classes=dict(
+        eda=EncoderDecoderAttractor,
+    ),
+    type_check=torch.nn.Module,
+    default="eda",
+)
 
 
 class DiarTask(AbsTask):
@@ -594,3 +602,294 @@ class DiarTask(AbsTask):
             var_dict_torch_update.update(var_dict_torch_update_local)
 
         return var_dict_torch_update
+
+
+class EENDOLADiarTask(AbsTask):
+    # If you need more than 1 optimizer, change this value
+    num_optimizers: int = 1
+
+    # Add variable objects configurations
+    class_choices_list = [
+        # --frontend and --frontend_conf
+        frontend_choices,
+        # --specaug and --specaug_conf
+        model_choices,
+        # --encoder and --encoder_conf
+        encoder_choices,
+        # --speaker_encoder and --speaker_encoder_conf
+        encoder_decoder_attractor_choices,
+    ]
+
+    # If you need to modify train() or eval() procedures, change Trainer class here
+    trainer = Trainer
+
+    @classmethod
+    def add_task_arguments(cls, parser: argparse.ArgumentParser):
+        group = parser.add_argument_group(description="Task related")
+
+        # NOTE(kamo): add_arguments(..., required=True) can't be used
+        # to provide --print_config mode. Instead of it, do as
+        # required = parser.get_default("required")
+        # required += ["token_list"]
+
+        group.add_argument(
+            "--token_list",
+            type=str_or_none,
+            default=None,
+            help="A text mapping int-id to token",
+        )
+        group.add_argument(
+            "--split_with_space",
+            type=str2bool,
+            default=True,
+            help="whether to split text using <space>",
+        )
+        group.add_argument(
+            "--seg_dict_file",
+            type=str,
+            default=None,
+            help="seg_dict_file for text processing",
+        )
+        group.add_argument(
+            "--init",
+            type=lambda x: str_or_none(x.lower()),
+            default=None,
+            help="The initialization method",
+            choices=[
+                "chainer",
+                "xavier_uniform",
+                "xavier_normal",
+                "kaiming_uniform",
+                "kaiming_normal",
+                None,
+            ],
+        )
+
+        group.add_argument(
+            "--input_size",
+            type=int_or_none,
+            default=None,
+            help="The number of input dimension of the feature",
+        )
+
+        group = parser.add_argument_group(description="Preprocess related")
+        group.add_argument(
+            "--use_preprocessor",
+            type=str2bool,
+            default=True,
+            help="Apply preprocessing to data or not",
+        )
+        group.add_argument(
+            "--token_type",
+            type=str,
+            default="char",
+            choices=["char"],
+            help="The text will be tokenized in the specified level token",
+        )
+        parser.add_argument(
+            "--speech_volume_normalize",
+            type=float_or_none,
+            default=None,
+            help="Scale the maximum amplitude to the given value.",
+        )
+        parser.add_argument(
+            "--rir_scp",
+            type=str_or_none,
+            default=None,
+            help="The file path of rir scp file.",
+        )
+        parser.add_argument(
+            "--rir_apply_prob",
+            type=float,
+            default=1.0,
+            help="THe probability for applying RIR convolution.",
+        )
+        parser.add_argument(
+            "--cmvn_file",
+            type=str_or_none,
+            default=None,
+            help="The file path of noise scp file.",
+        )
+        parser.add_argument(
+            "--noise_scp",
+            type=str_or_none,
+            default=None,
+            help="The file path of noise scp file.",
+        )
+        parser.add_argument(
+            "--noise_apply_prob",
+            type=float,
+            default=1.0,
+            help="The probability applying Noise adding.",
+        )
+        parser.add_argument(
+            "--noise_db_range",
+            type=str,
+            default="13_15",
+            help="The range of noise decibel level.",
+        )
+
+        for class_choices in cls.class_choices_list:
+            # Append --<name> and --<name>_conf.
+            # e.g. --encoder and --encoder_conf
+            class_choices.add_arguments(group)
+
+    @classmethod
+    def build_collate_fn(
+            cls, args: argparse.Namespace, train: bool
+    ) -> Callable[
+        [Collection[Tuple[str, Dict[str, np.ndarray]]]],
+        Tuple[List[str], Dict[str, torch.Tensor]],
+    ]:
+        assert check_argument_types()
+        # NOTE(kamo): int value = 0 is reserved by CTC-blank symbol
+        return CommonCollateFn(float_pad_value=0.0, int_pad_value=-1)
+
+    @classmethod
+    def build_preprocess_fn(
+            cls, args: argparse.Namespace, train: bool
+    ) -> Optional[Callable[[str, Dict[str, np.array]], Dict[str, np.ndarray]]]:
+        assert check_argument_types()
+        if args.use_preprocessor:
+            retval = CommonPreprocessor(
+                train=train,
+                token_type=args.token_type,
+                token_list=args.token_list,
+                bpemodel=None,
+                non_linguistic_symbols=None,
+                text_cleaner=None,
+                g2p_type=None,
+                split_with_space=args.split_with_space if hasattr(args, "split_with_space") else False,
+                seg_dict_file=args.seg_dict_file if hasattr(args, "seg_dict_file") else None,
+                # NOTE(kamo): Check attribute existence for backward compatibility
+                rir_scp=args.rir_scp if hasattr(args, "rir_scp") else None,
+                rir_apply_prob=args.rir_apply_prob
+                if hasattr(args, "rir_apply_prob")
+                else 1.0,
+                noise_scp=args.noise_scp if hasattr(args, "noise_scp") else None,
+                noise_apply_prob=args.noise_apply_prob
+                if hasattr(args, "noise_apply_prob")
+                else 1.0,
+                noise_db_range=args.noise_db_range
+                if hasattr(args, "noise_db_range")
+                else "13_15",
+                speech_volume_normalize=args.speech_volume_normalize
+                if hasattr(args, "rir_scp")
+                else None,
+            )
+        else:
+            retval = None
+        assert check_return_type(retval)
+        return retval
+
+    @classmethod
+    def required_data_names(
+            cls, train: bool = True, inference: bool = False
+    ) -> Tuple[str, ...]:
+        if not inference:
+            retval = ("speech", "profile", "binary_labels")
+        else:
+            # Recognition mode
+            retval = ("speech")
+        return retval
+
+    @classmethod
+    def optional_data_names(
+            cls, train: bool = True, inference: bool = False
+    ) -> Tuple[str, ...]:
+        retval = ()
+        assert check_return_type(retval)
+        return retval
+
+    @classmethod
+    def build_model(cls, args: argparse.Namespace):
+        assert check_argument_types()
+
+        # 1. frontend
+        if args.input_size is None or args.frontend == "wav_frontend_mel23":
+            # Extract features in the model
+            frontend_class = frontend_choices.get_class(args.frontend)
+            if args.frontend == 'wav_frontend':
+                frontend = frontend_class(cmvn_file=args.cmvn_file, **args.frontend_conf)
+            else:
+                frontend = frontend_class(**args.frontend_conf)
+            input_size = frontend.output_size()
+        else:
+            # Give features from data-loader
+            args.frontend = None
+            args.frontend_conf = {}
+            frontend = None
+            input_size = args.input_size
+
+        # 2. Encoder
+        encoder_class = encoder_choices.get_class(args.encoder)
+        encoder = encoder_class(input_size=input_size, **args.encoder_conf)
+
+        # 3. EncoderDecoderAttractor
+        encoder_decoder_attractor_class = encoder_decoder_attractor_choices.get_class(args.encoder_decoder_attractor)
+        encoder_decoder_attractor = encoder_decoder_attractor_class(**args.encoder_decoder_attractor_conf)
+
+        # 9. Build model
+        model_class = model_choices.get_class(args.model)
+        model = model_class(
+            frontend=frontend,
+            encoder=encoder,
+            encoder_decoder_attractor=encoder_decoder_attractor,
+            **args.model_conf,
+        )
+
+        # 10. Initialize
+        if args.init is not None:
+            initialize(model, args.init)
+
+        assert check_return_type(model)
+        return model
+
+    # ~~~~~~~~~ The methods below are mainly used for inference ~~~~~~~~~
+    @classmethod
+    def build_model_from_file(
+            cls,
+            config_file: Union[Path, str] = None,
+            model_file: Union[Path, str] = None,
+            cmvn_file: Union[Path, str] = None,
+            device: str = "cpu",
+    ):
+        """Build model from the files.
+
+        This method is used for inference or fine-tuning.
+
+        Args:
+            config_file: The yaml file saved when training.
+            model_file: The model file saved when training.
+            cmvn_file: The cmvn file for front-end
+            device: Device type, "cpu", "cuda", or "cuda:N".
+
+        """
+        assert check_argument_types()
+        if config_file is None:
+            assert model_file is not None, (
+                "The argument 'model_file' must be provided "
+                "if the argument 'config_file' is not specified."
+            )
+            config_file = Path(model_file).parent / "config.yaml"
+        else:
+            config_file = Path(config_file)
+
+        with config_file.open("r", encoding="utf-8") as f:
+            args = yaml.safe_load(f)
+        args = argparse.Namespace(**args)
+        model = cls.build_model(args)
+        if not isinstance(model, AbsESPnetModel):
+            raise RuntimeError(
+                f"model must inherit {AbsESPnetModel.__name__}, but got {type(model)}"
+            )
+        if model_file is not None:
+            if device == "cuda":
+                device = f"cuda:{torch.cuda.current_device()}"
+            checkpoint = torch.load(model_file, map_location=device)
+            if "state_dict" in checkpoint.keys():
+                model.load_state_dict(checkpoint["state_dict"])
+            else:
+                model.load_state_dict(checkpoint)
+        model.to(device)
+        return model, args