发明名称 SYSTEM, METHOD AND COMPUTER-READABLE MEDIUM FOR ENCODING A SIGNAL INTO MACROBLOCKS
摘要 A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non linear, piece-wise linear scaling functions to a DC luminance signal, a DC chrominance signal and an AC chrominance signal. A code for reporting updates of the value of the quantization parameter is interpreted to require larger changes when the quantization parameter initially is large and smaller changes when the quantization parameter initially is small.
申请公布号 US2016323580(A1) 申请公布日期 2016.11.03
申请号 US201615207154 申请日期 2016.07.11
申请人 AT&T Intellectual Property II, L.P. 发明人 Haskell Barin Geoffry;Puri Atul;Schmidt Robert Lewis
分类号 H04N19/126;H04N19/61;H04N19/176 主分类号 H04N19/126
代理机构 代理人
主权项 1. An encoder comprising: a processor; and a computer-readable storage medium storing instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising: receiving a block of data;determining an update code representing a first adjustment to a quantization parameter for the block of data as follows: (i) determining a first 2-bit code to be the update code, when the first adjustment equals −1;(ii) determining a second 2-bit code to be the update code, when the first adjustment equals −2;(iii) determining a third 2-bit code to be the update code, when the first adjustment equals 1; or(iv) determining a fourth 2-bit code to be the update code, when the first adjustment equals 2; andsending the update code to a decoder.
地址 Atlanta GA US