Picture coding device and method, picture transmitting...

Details Picture coding device and method, picture transmitting... Picture coding device and method, picture transmitting...

2005-11-01

2005-11-01

Wong, Allen (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240000, C375S240020, C375S240120

Reexamination Certificate

active

06961375

ABSTRACT:
In a quantizing circuit15, DCT coefficients output from a DCT circuit14are quantized with the quantizing step corresponding to a quantizing index supplied from a quantizing index determining circuit25. In the quantizing index determining circuit25, the quantizing index is determined on the basis of a first variable corresponding to an occurrence code amount as a data accumulative amount of a buffer17and a second variable corresponding to the activity of macroblocks output from an activity detection circuit24. In this case, the quantizing index determining circuit25adaptively sets a fixing mode for fixing the first variable or a variable mode for making variable the

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patent: 5089888 (1992-02-01), Zdepski et al.
patent: 5410351 (1995-04-01), Kojima
patent: 5473377 (1995-12-01), Kim
patent: 0 514 663 (1992-04-01), None

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