Sound-picture synchronous compression and synchronous reproducti

Details Sound-picture synchronous compression and synchronous reproducti Sound-picture synchronous compression and synchronous reproducti

1998-02-12

2000-08-15

Kelley, Chris S.

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

348516, 348423, 386 39, H04B 166, H04N 712

Patent

active

061047562

ABSTRACT:
In a sound-picture synchronous compression device, the picture compression process is performed on a designated amount of picture codes. Then, a necessary amount of sound codes is calculated on the basis of a time of the picture compression process and is subjected to sound compression process. Consequently, compressed picture codes and compressed sound codes are transmitted to a sound-picture synchronous reproduction device. Herein, the picture reproduction process is performed on a designated amount of the compressed picture codes. Then, a necessary amount of the compressed sound codes is calculated on the basis of a time of the picture reproduction process and is subjected to sound reproduction process. Thus, the device reproduces the picture codes and sound codes, based on which pictures and sounds are output by the monitor and speaker respectively. The switching between the sound processing and picture processing in compression and reproduction is made with a reduced overhead, while the switching is performed in such a way that the sound processing does not break off. Incidentally, the picture codes correspond to a number of macro blocks while the sound codes correspond to a number of AAUs.

REFERENCES:
patent: 5467139 (1995-11-01), Lankford
patent: 5481543 (1996-01-01), Veltman
patent: 5508816 (1996-04-01), Ueda et al.
patent: 5583652 (1996-12-01), Ware
patent: 5784572 (1998-07-01), Restoker et al.
patent: 5808722 (1998-09-01), Suzuki

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