Fine granular scalable video with embedded DCT coding of the enhancement layer

• US 6,826,232 B2
• Filed: 12/20/1999
• Issued: 11/30/2004
• Est. Priority Date: 12/20/1999
• Status: Expired due to Term

• Current Assignee: Funai Electric Co., Ltd. (Funai Electric Holdings Company Limited)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Chen, Yingwei, Radha, Hayder, van der Schaar, Mihaela
• Primary Examiner(s): Rao, Andy
• Application Number:
  US09/467,589
• Publication Number:
  US 20030133499A1
• Time in Patent Office: 1,807 Days
• Field of Search: 375/240--24, 375/240.18
• US Class Current: 375/240.18
• CPC Class Codes: H04N 19/129 Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
• 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 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/34 Scalability techniques involving progressive bit-plane based encoding of the enhancement layer, e.g. fine granular scalability [FGS]

Abstract

The present invention is directed to a method for encoding video data in an embedded fashion in order to achieve fine granular scalable video. The method includes the video data being transformed into a plurality of DCT coefficients. Further, the DCT coefficients are arranged into sub-groups and the DCT coefficients are scanned according to the sub-groups. The DCT coefficients being scanned by the sub-groups enables a higher level of scalability to be achieved.

Claims

1. A method for scanning discrete cosine transform (DCT) coefficients, the method comprising the steps of:

dividing the DCT coefficients into bit-planes;

arranging the DCT coefficients of each of the bit-planes into sub-groups; and

scanning the DCT coefficients of each of the bit-planes according to the sub groups.

2. The method of claim 1, wherein each of the sub-groups has an L-configuration.

3. The method of claim 1, wherein each of the sub-groups is scanned in a spatial order.

4. The method of claim 1, wherein the DCT coefficients are enhancement layer DCT coefficients.

5. A method for encoding video data, the method comprising the steps of:

transforming the video data into a plurality of DCT coefficients;

dividing the DCT coefficients into bit-planes;

arranging the DCT coefficients of each of the bit-planes into sub-groups; and

scanning the DCT coefficients of each of the bit-planes according to the sub-groups.

6. The method of claim 5, wherein each of the sub-groups has an L-configuration.

7. The method of claim 5, wherein each of the sub-groups is scanned in a spatial order.

8. The method of claim 5, wherein the video data is enhancement layer video data.