Jianwen Chen from Eastvale, CA, age 69

Method And Apparatus Of Quantization Matrix Coding
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US Patent:

20130272391, Oct 17, 2013
Filed:

Apr 16, 2013
Appl. No.:

13/864054
Inventors:

Jianwen Chen - Los Angeles CA, US
Jingsheng Cong - Pacific Palisades CA, US
Assignee:

Futurewei Technologies, Inc. - Plano TX
International Classification:

H04N 7/26
US Classification:

37524003
Abstract:

A method of coding a quantization matrix (QM) comprising non-uniformly downsampling the QM to generate a plurality of downsampled quantization coefficients. Also, an apparatus used in video encoding comprising a processor configured to non-uniformly downsample a QM to generate a plurality of downsampled quantization coefficients, scan the downsampled quantization coefficients, and encode the downsampled quantization coefficients based on scanning the downsampled quantization coefficients to generate encoded coefficients, and a transmitter coupled to the processor and configured to transmit a bitstream comprising a picture parameter set containing the encoded coefficients.

Weighted Prediction Method And Apparatus In Quantization Matrix Coding
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US Patent:

20130177075, Jul 11, 2013
Filed:

Jan 9, 2013
Appl. No.:

13/737863
Inventors:

Jianwen Chen - Los Angeles CA, US
Jingsheng Jason Cong - Pacific Palisades CA, US
Assignee:

FUTUREWEI TECHNOLOGIES, INC. - Plano TX
International Classification:

H04N 7/26
US Classification:

37524003
Abstract:

A method for decoding and reconstructing a QM associated with a picture, wherein the method comprises acquiring at least one reference QM and at least one weighting factor associated with the reference QM, wherein the reference QM is a previously decoded QM, and computing a predicted matrix using the reference QM and the weighting factor associated with the reference QM, wherein the predicted matrix is used to reconstruct the QM. In another embodiment, a method for encoding a QM associated with a picture, wherein the method comprises acquiring a first QM reference and a second QM reference, acquiring a first weighting factor that corresponds to the first QM reference and a second weighting factor that corresponds to the second QM reference, obtaining the predicted QM using the first QM reference, the second QM reference, the first weighting factor, and the second weighting factor.