Programmable quantization dead zone and threshold for...

Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal

Reexamination Certificate

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C375S240040

Reexamination Certificate

active

07620103

ABSTRACT:
A video encoder is disclosed that includes an encoder circuit, a quantizer circuit and a control circuit. The encoder circuit may be configured to generate a number of coefficient values in response to a video stream and a number of quantized values. The quantizer circuit may be configured to generate the number of quantized values in response to the coefficient values, two or more quantization dead zones and two or more offsets. The control circuit may be configured to set the two or more quantization dead zones and the two or more offsets to different values. The two or more quantization dead zones and the two or more offsets are independently programmable.

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Tao, B. “On Optimal Entropy-Constrained Deadzone Quantization”.—IEEE Trans. on Cir. and Sys. for Video Tech.—11.4 (Apr. 2001): pp. 560-563.
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Swiss Federal Institute of Technology, “Architectures for Video Processing” (created Jun. 12, 2002).
ITU-Telecommunications Standardization Sector, Study Group 16 Question 6, Video Coding Experts Group (VCEG), 15thMeeting: Pattaya, Thailand, Dec. 4-6, 2001, pp. 1-11.
ITU-Telecommunications Standardization Sector, Study Group 16 Question 6, Video Coding Experts Group (VCEG), 14thMeeting: Santa Barbara, CA, USA, Sept. 24-28, 2001, pp. 1-18.
Joint Video Team (JVT) of ISO/IEC MPEG & ITU-T VCEG (ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6), 2ndMeeting: Geneva, CH, Jan. 29-Feb. 1, 2002, pp. 1-18.

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