Television – Synchronization – Locking of video or audio to reference timebase
Reexamination Certificate
2005-06-28
2005-06-28
Hsia, Sherrie (Department: 2614)
Television
Synchronization
Locking of video or audio to reference timebase
C348S512000
Reexamination Certificate
active
06912011
ABSTRACT:
A method for measuring audio and video synchronization error of an audio/video encoder system is provided. The method includes steps of: producing a reference video data having a first time length and including a particular image pattern and a reference audio data having a second time length; inputting the reference video data and the reference audio data into the audio/video encoder system to produce an encoded video data and an encoded audio data; processing the encoded video data and the encoded audio data respectively to produce a detected video data having the first time length and including the particular image pattern and a detected audio data having the second time length; and detecting a first time point of an audio data of the reference audio data synchronized with the particular image pattern of the reference video data and a second time point of an audio data of the detected audio data synchronized with the particular image pattern of the detected video data by an analyzing tool, and calculating a difference between the first time point and the second time point.
REFERENCES:
patent: 5661728 (1997-08-01), Finotello et al.
patent: 5815634 (1998-09-01), Daum et al.
patent: 5874997 (1999-02-01), Haigh
patent: 6836295 (2004-12-01), Cooper
Haverstock & Owens LLP
Hsia Sherrie
Winbond Electronics Corp.
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