METHOD AND APPARATUS FOR DYNAMIC ADAPTATION OF VIDEO ENCODER PARAMETERS

• US 20150208070A1
• Filed: 06/24/2013
• Published: 07/23/2015
• Est. Priority Date: 06/28/2012
• Status: Abandoned Application

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Verzijp, Nico, Macq, Jean-Francois, Rondao Alface, Patrice
• Application Number:
  US14/411,123
• Publication Number:
  US 20150208070A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 19/107 between spatial and temporal predictive coding, e.g. picture refresh
• 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 19/137 Motion inside a coding unit, e.g. average field, frame or block difference
• CPC Class Codes: H04N 19/162 User input
• CPC Class Codes: H04N 19/167 Position within a video image, e.g. region of interest [ROI]
• CPC Class Codes: H04N 19/17 the unit being an image region, e.g. an object
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/196 being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters processing of motion vectors H04N19/513
• 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 19/463 by compressing encoding parameters before transmission
• CPC Class Codes: H04N 19/51 Motion estimation or motion compensation
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/86 involving reduction of coding artifacts, e.g. of blockiness

Abstract

A method for adapting at least one video encoding parameter to be used for encoding of a video for being transmitted from a server to a client, comprises a step of determining whether the movement speed of a region of interest over successive ones of previously encoded and transmitted frames of said video exceeds a predetermined threshold value, and a step of adapting said at least one video encoding parameter if said predetermined threshold value is exceeded.

Claims

1. A method for adapting at least one video encoding parameter to be used for encoding of a video for being transmitted from a server (S) to a client (C), said method comprising determining whether the movement speed of a region of interest over successive ones of previously encoded and transmitted frames of said video exceeds a predetermined threshold value, and adapting said at least one video encoding parameter if said predetermined threshold value is exceeded.

2. Method according to claim 1, wherein said movement speed of said region of interest is determined by monitoring commands issued by said client on said region of interest.

3. Method according to claim 1 wherein said movement speed of said region of interest is determined by monitoring previously determined encoding decisions used during encoding of previous frames.

4. Method according to claim 1 wherein said at least one parameter is a quantization parameter and wherein said quantization parameter is adapted such as to increase with increasing movement speed of said region of interest.

5. Method according to claim 1, wherein said at least one encoding parameter relates to a changing from inter to intra-coding, such that in case said movement speed of said region of interest exceeds said predetermined threshold value, intra-coding of macroblocks will be enforced.

6. Method according to claim 1, wherein said at least one encoding parameter relates to the use of a deblocking filter which is enforced in case said movement speed of said region of interest exceeds said predetermined threshold value.

13. A computer program product comprising software adapted to perform the method in accordance to claim 1, when executed on a data-processing apparatus.

7. Video server (S) for encoding a video for subsequent transmission towards a client (C) coupled to said video server (S), said video server (S) being adapted to determine whether the movement speed of a region of interest over successive ones of previously encoded and transmitted frames of said video exceeds a predetermined threshold value, and to adapt at least one video encoding parameter if said predetermined threshold value is exceeded.

8. Video server according to claim 7 further being adapted to determine said movement speed of said region of interest is by monitoring commands issued by said client on said region of interest.

9. Video server according to claim 7 further being adapted to determine said movement speed of said region of interest by monitoring previously determined encoding decisions used during encoding of previous frames.

10. Video server according to claim 7, wherein said at least one parameter is a quantization parameter and wherein said video server is able to adapt said quantization parameter such as to increase with increasing movement speed of said region of interest.

11. Video server according to claim 7, wherein said at least one encoding parameter relates to a changing from inter to exceeds said predetermined threshold value, intra-coding of macroblocks will be enforced.

12. Video server according to claim 7, wherein said at least one encoding parameter relates to the use of a deblocking filter which is enforced in case said movement speed of said region of interest exceeds said predetermined threshold value.