Apparatus and method for object based rate control in a coding s

Details Apparatus and method for object based rate control in a coding s Apparatus and method for object based rate control in a coding s

1998-06-15

2000-02-08

Tung, Bryan

Television

Bandwidth reduction system

Data rate reduction

348419, H04N 724

Patent

active

06023296&

ABSTRACT:
A method and apparatus for selecting a quantizer scale for each object within a frame to optimize the coding rate is disclosed. A quantizer scale is selected for each region or "object" within each frame such that the target bit rate for the frame is achieved while maintaining a uniform visual quality over the entire frame.

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"A New Rate Control Scheme Using Quadratic Rate Distortion Model", T. Chiang and Y-Q. Zhang, IEEE Transactions on Circuits and Systems for Video Technology, vol. 7, No. 1, Feb. 1997, pp. 246-250.
A. Vetro, H. Sun, Joint Rate Control for Coding Multiple Video Objects Based on Quadratic Rate-Distortion JTC1/SC29/WG11 Coding of Moving Pictures and Associated Audio MPEG97/1631 Feb. 17-21, 1997, Sevilla, Spain.
S. Ryoo, J. Shin and E. Jang, "Results of Core Experiment" JTC1/SC29/WG11 Coding of Moving Pictures and Associated Audio MPEG97/1657 Feb. 17-21, 1997, Sevilla, Spain.
A. Vetro, H. Sun, "Results of Core Experiment Q2: Comparison of VM and TMN6 Rate Control" JTC1/SC29/WG11 Coding of Moving Pictures and Associated Audio MPEG97/1797 Feb. 17-21, 1997, Sevilla, Spain.

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