Added medium-sized YouTube dataset and TTS dataset

Added medium-sized YouTube dataset and TTS dataset

Key changes:

• The storage format was changed to on-disk DB with hashes;
• Added a 700 hour YouTube dataset;
• Added a 700+ hour TTS dataset with Russian addresses;
• Added some utils to work with manifests;
• Added manifest files for easier porting into your ASR application;
• Discarded previous links;
• Dataset format will be uniform from now, new "datasets" will be just added;

Coming soon:

• Large (1,500 hours) phone call dataset;
• Large (1,500 hours) YouTube dataset;
• ... and more)

Dataset composition

Dataset	Utterances	Hours	GB	Av len/chars	Comment	Annotation	Quality/noise
asr_public_phone_calls_2 (*)		1,500			* Coming soon
public_youtube1500 (*)		1,500			* Coming soon
tts_russian_addresses	1,741,838	754	81	1.6s / 20	Russian addresses	TTS, 4 voices	100% / crisp
public_youtube700	759,483	701	75	3.3s / 43	Youtube videos	Subtitles	>95% / ~crisp
asr_public_phone_calls_1	233,868	211	23	3.3s / 29	Phone calls	ASR	70% / noisy
asr_public_stories_1	46,142	38	4	3.0s / 30	Books	ASR	70% / crisp
public_series_1	20,243	17	2	3.1s / 38	Youtube videos	Subtitles	95% / ~crisp
ru_RU	5,826	17	2	10.8s / 12	Public dataset	Alignment	99% / crisp
voxforge_ru	8,344	17	2	7.5s / 77	Public dataset	Reading	100% / crisp
russian_single	3,357	9	1	9.3s / 102	Public dataset	Alignment	99% / crisp
public_lecture_1	6,803	6	1	3.4s / 47	Lectures	Subtitles	>95% / crisp
Total	2,825,904	1,771	190

Links

Meta data file.

Dataset	GB	GB, compressed	Audio	Source	Manifest
tts_russian_addresses_rhvoice_4voices	80.9	67.0	part1, part2, part3, part4	TTS	link
public_youtube700	75.0	67.0	part1, part2, part3, part4	YouTube videos	link
asr_public_phone_calls_1	22.7	19.0	part1	ASR + public phone calls	link
asr_public_stories_1	4.1	3.8	part1	Public stories	link
public_series_1	1.9	1.7	part1	Public series	link
ru_RU	1.9	1.4	part1	Caito.de dataset	link
voxforge_ru	1.9	1.5	part1	Voxforge dataset	link
russian_single	0.9	0.7	part1	Russian single speaker dataset	link
public_lecture_1	0.7	0.6	part1	Public lectures	link
Total	190	163