Question about training process

[sphmel]

it seems T5 embedding from FrozenT5 has shape (B, max_length, D)

LLM-Codec/codec/MSCodec.py

Lines 73 to 78 in e21c1bf

	def encode(self, text):
	t5_batch_encoding = self.t5_tokenizer(text, truncation=True, max_length=self.max_length, return_length=True,
	return_overflowing_tokens=False, padding="max_length", return_tensors="pt")
	struct_tokens = t5_batch_encoding["input_ids"].to(self.device)
	z = self.t5_transformer(input_ids=struct_tokens).last_hidden_state
	return z

is text_feature used for semantic loss in quantizer mean-pooled T5 embedding from FrozenT5??

LLM-Codec/codec/vq.py

Line 113 in e21c1bf

tmp_g_se_loss = self.loss_fn(z_q_i.mean(2), text_features)

2. neural codecs, vocoders are usually trained using random segment of audio. is LLM-codec also trained using random segments? or whole audio?

[yangdongchao]

it seems T5 embedding from FrozenT5 has shape (B, max_length, D)

LLM-Codec/codec/MSCodec.py

Lines 73 to 78 in e21c1bf

	def encode(self, text):
	t5_batch_encoding = self.t5_tokenizer(text, truncation=True, max_length=self.max_length, return_length=True,
	return_overflowing_tokens=False, padding="max_length", return_tensors="pt")
	struct_tokens = t5_batch_encoding["input_ids"].to(self.device)
	z = self.t5_transformer(input_ids=struct_tokens).last_hidden_state
	return z

is text_feature used for semantic loss in quantizer mean-pooled T5 embedding from FrozenT5??

LLM-Codec/codec/vq.py

Line 113 in e21c1bf

tmp_g_se_loss = self.loss_fn(z_q_i.mean(2), text_features)

2. neural codecs, vocoders are usually trained using random segment of audio. is LLM-codec also trained using random segments? or whole audio?

1. Yes, we use global pooling to extract T5 embedding
2. We randomly crop a segment to train, due to the encoder is convolution net, so it can encode any length of audio in the inference.

[sphmel]

@yangdongchao Thanks for fast reply. So, T5-embedding is from padded whole utterance's transcript or caption, and quantized latent is from random crop?

By the way, I really like this approach, injecting subword, word-level info directly into codec.

[yangdongchao]

@yangdongchao Thanks for fast reply. So, T5-embedding is from padded whole utterance's transcript or caption, and quantized latent is from random crop?

By the way, I really like this approach, injecting subword, word-level info directly into codec.

Yes, You are right. I am sorry for the late reply. I donot notice this message in the pass days.