Maintaining a plurality of codebooks related to a video signal

• US 7,397,858 B2
• Filed: 05/28/2003
• Issued: 07/08/2008
• Est. Priority Date: 05/29/2002
• Status: Expired due to Fees

• Current Assignee: Video 264 Innovations, LLC
• Original Assignee: Innovation Management Sciences, LLC
• Inventors: Fogg, Chad, Butler, Simon, Webb, Richard, Garrido, Diego
• Primary Examiner(s): Diep; Nhon
• Application Number:
  US10/447,216
• Publication Number:
  US 20040017853A1
• Time in Patent Office: 1,868 Days
• Field of Search: None
• US Class Current: 375/240.29
• CPC Class Codes: H04N 19/117 Filters, e.g. for pre-processing or post-processing sub-band filter banks H04N19/635
• CPC Class Codes: H04N 19/124 Quantisation
• CPC Class Codes: H04N 19/126 Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
• CPC Class Codes: H04N 19/14 Coding unit complexity, e.g. amount of activity or edge presence estimation H04N19/146 takes precedence
• CPC Class Codes: H04N 19/149 by estimating the code amount by means of a model, e.g. mathematical model or statistical model
• CPC Class Codes: H04N 19/15 by monitoring actual compressed data size at the memory before deciding storage at the transmission buffer
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/177 the unit being a group of pictures [GOP]
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/51 Motion estimation or motion compensation
• CPC Class Codes: H04N 19/527 Global motion vector estimation
• CPC Class Codes: H04N 19/59 involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 19/80 Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation H04N19/635, H04N19/86 take precedence
• CPC Class Codes: H04N 19/82 involving filtering within a prediction loop
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression
• CPC Class Codes: H04N 19/86 involving reduction of coding artifacts, e.g. of blockiness
• CPC Class Codes: H04N 19/94 : Vector quantisation
• CPC Class Codes: H04N 7/0125 : one of the standards being a high definition standard
• CPC Class Codes: H04N 7/0137 : dependent on presence/absence of motion, e.g. of motion zones H04N7/014 takes precedence; movement detection in television signals H04N5/144
• CPC Class Codes: H04N 7/014 : involving the use of motion vectors motion estimation and compensation in video coding H04N19/51
• CPC Class Codes: H04N 7/0145 : the interpolation being class adaptive, i.e. it uses the information of class which is determined for a pixel based upon certain characteristics of the neighbouring pixels
• CPC Class Codes: H04N 9/8042 : involving data reduction

Abstract

A method of enhancing picture quality of a video signal is disclosed. The method comprises the steps of receiving an encoded video signal having a plurality of headers; maintaining a plurality of codebooks based upon the differences between a standard definition picture and a high definition picture; and providing a pointer to a particular codebook of the plurality of codebooks when decoding a frame of the video signal.

Claims

1. A method of enhancing picture quality of a video signal, said method comprising the steps of:

receiving an encoded video signal having a plurality of headers;

maintaining a plurality of codebooks based upon the differences between a standard definition picture and a high definition picture;

providing a pointer to a particular codebook of said plurality of codebooks when decoding a frame of said encoded video signal; and

decoding at least part of the encoded video signal based on the pointer.

2. The method of claim 1 wherein said step of receiving an encoded video signal comprises a step of receiving an encoded video signal having a plurality of headers comprising a current enhancement picture, a picture number and at least one codebook number to be applied to a scene.

3. The method of claim 2 further comprising a step of applying said at least one codebook number to a plurality of scenes of said encoded video signal.

4. The method of claim 1 further comprising a step of receiving a plurality of codebook numbers with said encoded video signal.

5. The method of claim 4 further comprising a step of applying said plurality of codebook numbers to a particular scene.

6. A method of enhancing picture quality of a video signal, said method comprising the steps of:

receiving an encoded video signal having a plurality of headers;

receiving a plurality of codebook numbers with said encoded video signal;

maintaining a plurality of codebooks based upon the differences between a standard definition picture and a high definition picture;

providing a pointer to a particular codebook of said plurality of codebooks; and

decoding a frame of said encoded video signal based on the pointer.

7. A method of enhancing picture quality of a video signal, said method comprising the steps of:

receiving an encoded video signal having a plurality of headers;

maintaining a plurality of codebooks based upon the differences between a standard definition picture and a high definition picture;

providing a first pointer to a first codebook when decoding a strip of said encoded video signal;

providing a second pointer to a second codebook when decoding said strip of said encoded video signal; and

decoding said strip of said encoded video signal based on said first or said second pointers.

8. The method of claim 7 wherein said step of receiving an encoded video signal comprises a step of receiving an encoded video signal having a plurality of headers comprising a current enhancement picture, a picture number and at least one codebook number to be applied to a scene.

9. The method of claim 8 further comprising a step of applying said at least one codebook number to a plurality of scenes of said encoded video signal.

10. The method of claim 7 wherein said step of providing a first pointer to a first codebook comprises a step of applying said first pointer to predetermined blocks within said strip of said encoded video signal.

11. The method of claim 7 wherein said step of providing a second pointer to a second codebook comprises a step of applying said second pointer to predetermined blocks within said video signal.

12. A method of enhancing picture quality of a video signal, said method comprising the steps of:

receiving an encoded video signal having a plurality of headers comprising a current enhancement picture, a picture number and at least one codebook number to be applied to a scene;

maintaining a plurality of codebooks based upon the differences between a standard definition picture and a high definition picture;

providing a first pointer to a first codebook when decoding a first predetermined block of a strip of said encoded video signal;

providing a second pointer to a second codebook when decoding a second predetermined block of said strip of said encoded video signal;

decoding said first predetermined block of a strip of said encoded video signal based on said first pointer; and

decoding said second predetermined block of said strip of said encoded video signal based on said second pointer.

13. A method of enhancing picture quality of a video signal, said method comprising the steps of:

partitioning a codebook on a regional basis;

receiving an encoded video signal having a plurality of headers;

maintaining a plurality of codebooks based upon said differences based upon the differences between a standard definition picture and a high definition picture;

providing a pointer to a particular codebook when decoding a frame of said encoded video signal; and

decoding the frame of said encoded video signal based on the pointer.

14. The method of claim 13 wherein said step of receiving an encoded video signal comprises a step of receiving an encoded video signal having a plurality of headers comprising a current enhancement picture, a picture number and at least one codebook number to be applied to a scene.

15. The method of claim 14 further comprising a step of applying said at least one codebook number to a plurality of scenes of said encoded video signal.

16. The method of claim 13 further comprising a step of receiving a plurality of codebook numbers with said encoded video signal.

17. The method of claim 16 further comprising a step of applying said plurality of codebook numbers to a particular scene.

18. A method of enhancing picture quality of a video signal, said method comprising the steps of:

partitioning a codebook on a regional basis;

receiving an encoded video signal having a plurality of headers comprising a current enhancement picture, a picture number and a plurality of codebook numbers to be applied to a scene;

maintaining a plurality of codebooks based upon said differences based upon the differences between a standard definition picture and a high definition picture;

providing a plurality of pointers to said plurality of codebooks; and

decoding a frame of said video signal by applying said plurality of codebooks to a particular scene.

19. The method of claim 18 further comprising a step of differentially sending codebook from previously transmitted codebooks held in long term memory.

20. The method of claim 18 further comprising a step of maintaining a predetermined set of universal codebooks in the receiver.

21. The method of claim 20 further comprising a step of selecting said codebooks by an enhancement stream header.

22. The method of claim 21 further comprising a step of downloading codebooks in said enhancement stream.