发明名称 |
Breakpoint determining for hybrid variable length coding and encoding the determined breakpoint |
摘要 |
A method, and apparatus, and logic encoded in one or more computer-readable tangible medium to carry out a method of determining a breakpoint position in an ordered sequence of quantized transform coefficients of a block of image data for a hybrid variable length coding the ordered sequence. The breakpoint location in the sequence is between a low-frequency region and a high-frequency region. The hybrid variable length coding method includes coding the low-frequency region using a selected low-frequency variable length coding method; coding the high-frequency region using a selected high-frequency variable length coding method; and coding the position in the sequence of the breakpoint. The breakpoint location is determining uses a relatively simple and fast method based on pre-defined cost criteria. A method is included that instead of coding the breakpoint separately, codes the breakpoint jointly with coefficient events.
|
申请公布号 |
US8121427(B2) |
申请公布日期 |
2012.02.21 |
申请号 |
US20070961795 |
申请日期 |
2007.12.20 |
申请人 |
TIAN DIHONG;CHANG PI SHENG;CHEN WEN-HSIUNG;CISCO TECHNOLOGY, INC. |
发明人 |
TIAN DIHONG;CHANG PI SHENG;CHEN WEN-HSIUNG |
分类号 |
G06K9/36;H03M7/34 |
主分类号 |
G06K9/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|