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Added uniform speaker sampling to RandomAssignSpeakersFromCorpus #254

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Added uniform speaker sampling to RandomAssignSpeakersFromCorpus #254

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26 changes: 23 additions & 3 deletions users/rossenbach/corpus/transform.py
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Original file line number Diff line number Diff line change
Expand Up @@ -107,24 +107,32 @@ def run(self):
c.dump(self.out_corpus.get())



class RandomAssignSpeakersFromCorpus(Job):
"""
Takes another bliss corpus as speaker reference and randomly distributes speaker tags

Used e.g. for synthetic TTS data
"""

def __init__(self, bliss_corpus: tk.Path, speaker_reference_bliss_corpus: tk.Path, seed: int = 42):

__sis_hash_exclude__ = {"randomize_speaker": True}

def __init__(self, bliss_corpus: tk.Path, speaker_reference_bliss_corpus: tk.Path, seed: int = 42,
randomize_speaker: bool = True):
"""

:param bliss_corpus: bliss corpus to assign speakers to
:param speaker_reference_bliss_corpus: bliss corpus to take speakers from
:param seed: random seed for deterministic behavior
:param randomize_speaker:
True: samples speakers at random
False: every speaker appears at least once if bliss_size > num_speakers
"""
self.bliss_corpus = bliss_corpus
self.speaker_reference_bliss_corpus = speaker_reference_bliss_corpus
self.seed = seed

self.randomize_speaker = randomize_speaker
self.out_corpus = self.output_path("corpus.xml.gz")

def tasks(self) -> Iterator[Task]:
Expand All @@ -141,14 +149,26 @@ def run(self):
speaker_corpus.load(self.speaker_reference_bliss_corpus.get_path())

out_corpus.speakers = speaker_corpus.speakers

# shuffle speaker list for randomization of sequence to speaker mapping
speaker_name_list = list(out_corpus.speakers.keys())
random.shuffle(speaker_name_list)
num_speakers = len(speaker_name_list)

for recording in out_corpus.all_recordings():
recording.speaker_name = None
recording.default_speaker = None
for segment in recording.segments:
segment.speaker_name = speaker_name_list[np.random.randint(num_speakers)]
if self.randomize_speaker:
segment.speaker_name = speaker_name_list[np.random.randint(num_speakers)]
else:
if len(speaker_name_list)>0:
segment.speaker_name = speaker_name_list.pop()
else:
# re-initialize random speaker list
speaker_name_list = list(out_corpus.speakers.keys())
random.shuffle(speaker_name_list)
segment.speaker_name = speaker_name_list.pop()

out_corpus.dump(self.out_corpus.get_path())

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