Systems and methods for signaling and performing temporal level switching in scalable video coding

• US 8,594,202 B2
• Filed: 10/12/2007
• Issued: 11/26/2013
• Est. Priority Date: 07/21/2006
• Status: Active Grant

• Current Assignee: Vidyo Incorporated (Enghouse Systems Limited)
• Original Assignee: Vidyo Incorporated (Enghouse Systems Limited)
• Inventors: Eleftheriadis, Alexandros
• Primary Examiner(s): MATTIS, JASON E
• Application Number:
  US11/871,612
• Publication Number:
  US 20090116562A1
• Time in Patent Office: 2,237 Days
• Field of Search: 375/240.25, 375/240.02, 375/240.26
• US Class Current: 375/240.25
• CPC Class Codes: H04N 19/31 in the temporal domain
• 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 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities

Abstract

Media communication systems and methods for media encoded using scalable coding with temporal scalability are provided. Transmitting endpoints include switching information in their transmitted media to indicate if temporal level switching at a decoder can occur at any frame of the transmitted encoded media.

Claims

1. A method for decoding media encoded using scalable coding with temporal scalability at a pre-determined maximum temporal level, the method comprising:

receiving a single bit flag temporal_level_nesting_flag in a sequence parameter set that is indicative of a temporally nested structure of layers and pertains to all frames of a coded video sequence; and

decoding with a decoding device those parts of the encoded media signal which correspond to temporal levels that are less than or equal to the maximum temporal level,

wherein the temporal_level_nesting_flag set to one indicates for any three frames picA, picB, picC included in the coded video sequence, that picB is not used for reference of picA;

under a first condition that picB is of a temporal level lower or equal than the temporal level of picA, and

under a second condition that the temporal level of picC is lower than the temporal level of picB, and

under a third condition that picC follows picB in decoding order, and

under a fourth condition that picC precedes picA in decoding order.

3. A non-transitory computer readable medium comprising a set of executable instructions to direct a processor to perform the methods recited in one of method claim 1 or 2.

4. The decoding device configured to perform the methods in one of claim 1 or 2.

2. A method for decoding media encoded using scalable coding with temporal scalability at a pre-determined maximum temporal level, the method comprising:

receiving a temporal_level_nesting_flag in a scalability information supplementary enhancement information (SSEI) message that is indicative of a temporally nested structure of layers and pertains to a plurality of frames, and

decoding with a decoding device those parts of the encoded media signal which correspond to temporal levels that are less than or equal to the maximum temporal level,

wherein the scalable coding complies with H.264/SVC, and

wherein the temporal_level_nesting_set to one indicates for any three frames picA, picB, picC included in the coded video sequence, that picB is not used for reference of picA;

under a first condition that picB is of a temporal level lower or equal than the temporal level of picA, and

under a second condition that the temporal level of picC is lower than the temporal level of picB, and

under a third condition that picC follows picB in decoding order, and

under a fourth condition that picC precedes picA in decoding order.