Frequency domain sample adaptive offset (SAO)

Patent metadata

Field	Value
Publication number	US-9380320-B2
Application number	US-201213623765-A
Country	US
Kind code	B2
Filing date	Sep 20, 2012
Priority date	Feb 10, 2012
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

Frequency domain sample adaptive offset (SAO). Video processing of a first signal operates to generate a second video signal such that at least one characteristic of a first portion of video information of the first video signal is replicated in generating a second portion of video information, such that the first portion of video information and the second portion of video information undergo combination to generate the second video signal. Such use of the first video signal may involve replication and scaling of the first video information to generate the second portion of video information. One possible characteristic of the first portion of video information may correspond to an energy profile as a function of frequency. One or more portions of the first video signal may be employed to generate different respective portions of the second signal. Such video processing operations may be performed on a block by block basis.

First claim

What is claimed is:

1. A communication device comprising:
a communication interface;
processor, at least one of the processor or the communication interface configured to:
receive a first video signal from another communication device;
select a first portion of video information from the first video signal, wherein the first portion of video information is included within a first frequency range located below a cutoff frequency;
replicate the first portion of video information to generate a copy of the first portion of video information that has a first energy profile that is same as the first portion of video information and scale downward the copy of the first portion of video information using at least one scale factor to generate a second portion of video information within a second frequency range that is relatively higher than the first frequency range;
combine the first portion of video information and the second portion of video information to generate a second video signal, wherein the second portion of video information is adjacently located to the first portion of video information within the second video signal, a second energy profile of the second video signal as a function of frequency includes a smooth transition between the first portion of video information and the second portion of video information, and the second energy profile of the second video signal as a function of frequency is substantially monotonically decreasing with increasing frequency; and
receive, from the another communication device, information that specifies at least one of the first frequency range, the cutoff frequency, the second frequency range that is relatively higher than the first frequency range, or the at least one scale factor.

2. The communication device of claim 1 , wherein the at least one of the processor or the communication interface is further configured to:
employ a first subset of the first portion of video information to generate a first subset of the second portion of video information within a third frequency range that is relatively higher than the first frequency range; and
employ a second subset of the first portion of video information to generate a second subset of the second portion of video information within a fourth frequency range that is relatively higher than the first frequency range.

3. The communication device of claim 1 , wherein the at least one of the processor or the communication interface is further configured to:
employ the first portion of video information to generate a first subset of the second portion of video information within a third frequency range that is relatively higher than the first frequency range and a second subset of the second portion of video information within a fourth frequency range that is relatively higher than the first frequency range.

4. The communication device of claim 1 further comprising:
a video decoder.

5. The communication device of claim 1 , wherein the communication device is operative within at least one of a satellite communication system, a wireless communication system, a wired communication system, a fiber-optic communication system, or a mobile communication system.

6. A communication device comprising:
a communication interface;
a processor, at least one of the processor or the communication interface configured to:
receive a first video signal from another communication device;
select a first portion of video information from the first video signal, wherein the first portion of video information is included within a first frequency range located below a cutoff frequency;
replicate at least one characteristic of the first portion of video information to generate a copy of the at least one characteristic of the first portion of video information;
process the copy of the at least one characteristic of the first portion of video information to generate a second portion of video information within a second frequency range that is relatively higher than the first frequency range including to scale downward a copy of the first portion of video information using at least one scale factor to generate the second portion of video information;
combine the first portion of video information and the second portion of video information to generate a second video signal, wherein the second portion of video information is adjacently located to the first portion of video information within the second video signal, an energy profile of the second video signal as a function of frequency includes a smooth transition between the first portion of video information and the second portion of video information, and the energy profile of the second video signal as a function of frequency is substantially monotonically decreasing with increasing frequency; and
receive, from the another communication device, information that specifies at least one of the first frequency range, the cutoff frequency, the second frequency range that is relatively higher than the first frequency range, or the at least one scale factor.

7. The communication device of claim 6 , wherein the at least one of the processor or the communication interface is further configured to:
replicate and scale the first portion of video information to generate the second portion of video information.

8. The communication device of claim 6 , wherein the at least one characteristic of the first portion of video information corresponding to another energy profile as a function of frequency.

9. The communication device of claim 6 , wherein the at least one of the processor or the communication interface is further configured to:
employ a first subset of the first portion of video information to generate a first subset of the second portion of video information within a third frequency range that is relatively higher than the first frequency range; and
employ a second subset of the first portion of video information to generate a second subset of the second portion of video information within a fourth frequency range that is relatively higher than the first frequency range.

10. The communication device of claim 6 , wherein the at least one of the processor or the communication interface is further configured to:
employ the first portion of video information to generate a first subset of the second portion of video information within a third frequency range that is relatively higher than the first frequency range and a second subset of the second portion of video information within a fourth frequency range that is relatively higher than the third frequency range.

11. The communication device of claim 6 , wherein the at least one of the processor or the communication interface is further configured to:
operate on a block by block basis to process the first video signal to generate the second video signal;
process a first at least one block of the first video signal to generate the second video signal using a first scale factor to generate a first subset of the second portion of video information; and
process a second at least one block of the first video signal to generate the second video signal using a second scale factor to generate a second subset of the second portion of video information.

12. The communication device of claim 6 further comprising:
a video decoder.

13. The communication device of claim 6 , wherein the communication device is operative within at least one of a satellite communication system, a wireless communication system, a wired communication system, a fiber-optic communication system, or a mobile communication system.

14. A method for execution by a communication device, th

Assignees

• Broadcom Corp

Inventors

• Shen Ba-Zhong
• Wan Wade K
• Chen Peisong

Classifications

• H04N19/48

  using compressed domain processing techniques other than decoding, e.g. modification of transform coefficients, variable length coding [VLC] data or run-length data (motion estimation in a transform domain H04N19/547; processing of decoded motion vectors H04N19/513) · CPC title

• H04N19/86 Primary

  involving reduction of coding artifacts, e.g. of blockiness · CPC title

• H04N19/82

  involving filtering within a prediction loop · CPC title

• H04N7/24 Primary

  Systems for the transmission of television signals using pulse code modulation (H04N21/00 takes precedence) · CPC title