Video signal encoding with bit rate control

Details Video signal encoding with bit rate control Video signal encoding with bit rate control

1990-03-30

1992-07-28

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, H04N 712

Patent

active

051344769

ABSTRACT:
Individual frames in a video signal are encoded using different coding techniques such as intraframe, motion compensated prediction and motion compensated interpolation coding. The encoder output, which is produced at a first highly variable rate, is applied to a channel via a buffer that outputs the encoded signal at a second, less variable rate. The rate allocated to different frame types is determined as a function of the type of frame being encoded and the coding technique being used. A second buffer may be used to eliminate almost all variations in the rate at which data is applied to the channel. Buffer fullness may control characteristics of the encoder such as quantizer step size and/or prefiltering.

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