class_docstr: ASR Task 
class_docstr_tok: ["ASR","Task"]
code: def _process_batch(self, batch):
      srcs, ilens, tgts, olens, uttid_list = self.converter(batch)
  
      imax = max(ilens)
      omax = max(olens)
      batch_feat = []
      batch_target = []
      for i in range(len(srcs)):
          # pad feat
          ipad_len = imax - srcs[i].shape[0]
          feat = np.pad(
              srcs[i],
              pad_width=((0, ipad_len), (0, 0)),
              mode="constant",
              constant_values=0,
          )
  
          # pad target
          opad_len = omax - tgts[i].shape[0]
          target = np.pad(
              tgts[i],
              pad_width=(0, opad_len),
              mode="constant",
              constant_values=0,
          )
  
          batch_feat.append(feat)
          batch_target.append(target)
  
      batch_uttid = np.array(uttid_list)
      batch_feat = np.stack(batch_feat).astype(np.float32)
      batch_target = np.stack(batch_target).astype(np.int64)
      ilens = np.array(ilens).astype(np.int64)
      olens = np.array(olens).astype(np.int64)
  
      return batch_uttid, batch_feat, ilens, batch_target, olens
  
imports: import numpy
  import delta.compat
  from absl import logging
  from delta import utils
  from delta.data.utils import espnet_utils
  from delta.utils.register import registers
  from delta.data.task.base_speech_task import SpeechTask
label_desc: Use image node_id 11 for calling the AsrSeqTask obj's underlying member method code with example usage: obj._process_batch(batch) and returns: batch_uttid,  batch_feat,  ilens,  batch_target,  olens