Method of entropy coding of transformation coefficient in image/video coding
Title:
Method of entropy coding of transformation coefficient in image/video coding
Application Number:
200510055289
Application Date:
2005/03/18
Announcement Date:
2005/09/07
Pub. Date:
2007/10/24
Publication Number:
1665303
Announcement Number:
100345449
Grant Date:
2007-10-24
Granted Pub. Date:
2007-10-24
ApplicationType:
Invention
State/Country:
11[China|beijing]
IPC:
H04N 7/26
Applicant(s):
Tsinghua University
Inventor(s):
He Yun, Chen Quqing
Key Words:
image, video, coding, transformation coefficient, entropy coding
Abstract:
The invention belongs to the field of picture/video coding/decoding in the signal processing, relating to an entropy coding method of conversion coefficient in the picture/video coding. The invention extracts the position information and value information of non-zero coefficients from a string of coefficients scanned to make the variable-length coding, and as coding the position information, combines the continuous zero coefficients and non-zero coefficients into two- dimensional combined pairs of zero-coefficient travel and non-zero-coefficient travel and makes variable-length coding on them, and as coding the value information, combines the continuous plus or minus 1 and the values or absolute values of the back coefficients with the absolute values greater than 1 into two-dimensional pairs of the travel of plus or minus 1 and the said value or absolute value, and makes the variable-length coding on them, or uses 1 bit to indicate if the absolute values of the string of non-zero coefficients are all 1. The invention makes further use of the statistical properties in the position information and the value information of the non-zero coefficients, thus obtaining a prior compressing performance to that of the existing entropy coding method.
Claim:
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