EP0689362A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Sound-synchronised video system
Assignee: AT&T Inc
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Filing: 1995-06-14
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Granted: —
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Expires: 2015-06-14
Abstract
Abstract A stream of unsynchronized audio signal, representing speech and video signal of a speaker, is processed by decoding (CD1) the signal, memorizing (in LT1) a plurality of visemes corresponding to phonemes in the audio signal, fetching from the plurality visemes corresponding to phonemes (from PR1) in the audio signal, and imparting a synchronism to the video signal and audio signal by applying the fetched visemes to the unsynchronized video signal of the stream in synchronism with corresponding phonemes in the audio signal of the stream. According to an embodiment, the fetching step includes fetching visemes of the lip movement. The system is suitable for use in a videophone.
Inventors
- 👤 Homer H. Chen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 10:21
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/40; H04N21/43; H04N21/434; H04N21/4341; H04N21/4302; H04N21/4307; H04N21/43072; H04N21/439; H04N21/4394; H04N21/44; H04N21/44008; G; G10; G10L; G10L21/00; G10L21/06; G10L21/10; G10L2021/105; G11; G11B; G11B2220/00; G11B2220/90; H04N19/00; H04N19/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A method of processing a stream of decoded and unsynchronized audio and video signals of a speaker, comprising: memorizing a plurality of visemes corresponding to phonemes in the decoded audio signal; fetching visemes corresponding to phonemes in the audio signal; and imparting a synchronism to the decoded video and audio signals by applying the fetched visemes to the unsynchronized video signal of the stream in synchronism with corresponding phonemes in the audio signal of the stream.
Claim 2
Dependent Claim
98 words
A communication method, comprising: transmitting and receiving streams of synchronized video and audio signals at a multiplicity of stations; at each of said stations, decoding said signals at a plurality of said multiplicity of stations: memorizing a plurality of visemes corresponding to phonemes in the decoded audio signal; fetching from the plurality of visemes visemes corresponding to phonemes in the audio signal; and imparting a synchronism to the video signal and audio signal by applying the fetched visemes to the unsynchronized video signal of the stream in synchronism with corresponding phonemes in the audio signal of the stream.
Claim 3
Dependent Claim
31 words
A method as in claim 1 or 2, wherein the imparting step includes extracting visemes from the decoded video signal and updating the memory of the visemes with the extracted visemes.
Claim 4
Dependent Claim
18 words
A method as in claim 1 or 2, wherein the fetching step includes fetching visemes of lip movement.
Claim 5
Independent Claim
87 words
An apparatus for processing a stream of decoded audio and video signals of a speaker, comprising: means for memorizing a plurality of visemes corresponding to phonemes in the audio signal; means, coupled to said means for memorizing, for imparting a synchronism to the video signal and audio signal by fetching from the plurality visemes visemes corresponding to phonemes in the audio signal and applying the fetched visemes to the unsynchronized video signal of the stream in synchronism with corresponding phonemes in the audio signal of the stream.
Claim 6
Dependent Claim
118 words
A communication system, comprising: a plurality of stations each having means for transmitting and receiving video and audio signals; a communication network linking said stations; means, at said stations, for decoding the signals; at a plurality of said stations: means coupled to said decoding means for memorizing a plurality of visemes corresponding to phonemes in the audio signal; means, coupled to said respective decoding means at each station, for imparting a synchronism to the video signal and audio signal, by fetching from the plurality visemes visemes corresponding to phonemes in the audio signal and applying the fetched visemes to the unsynchronized video signal of the stream in synchronism with corresponding phonemes in the audio signal of the stream.
Claim 7
Dependent Claim
30 words
An apparatus as in claim 5 or 6, wherein said decoding means includes means for decoding the audio signal from the stream and decoding the video signal from the stream.
Claim 8
Dependent Claim
20 words
An apparatus as in claim 5 or 6, wherein the imparting means includes means for fetching visemes of lip movement.
References Cited (Backward Citations)
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