Apparatus for and method of variable bit rate video coding

Details Apparatus for and method of variable bit rate video coding Apparatus for and method of variable bit rate video coding

2005-04-12

2005-04-12

Kelley, Chris (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

06879632

ABSTRACT:
The quantization step size is set on the basis of features of image and the average bit rate is adjusted for the variable bit rate coding. In more specifically, the quantization step size is set such as to hold a constant coded image quality level over a plurality of groups of pictures. The quantization step size is adjusted from the excess or shortage of the actual generated bit count with respect to the average bit rate with reference to the quantization step size that has been set as above.

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“An Algorithm of MPEF2 Real Time Variable Bit Rate Video Coding with Quantizer Step”, by Inada, et al., Information System Journal 2 C-11-3, p. 3, General Conference of the Institute of Electronics, Information and Communication Engineers in Mar., 1998.

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