Layer based hrd buffer management for scalable hevc

Abstract

The buffer management methods simplify the complexity of STD buffer management for HEVC and make is easy to implement HEVC in deployed AVC/MPEG-2 networks (as legacy re-multiplexers are able to be used for re-purposing HEVC content). The buffers for base and enhancement layers are also also be managed independently before re-assembly and this simplifies the STD model. Re-assembly is still implemented before decoding an enhanced HEVC video stream.

1 - 22 . (canceled) 
     
     
         23 . An encoding method, comprising:
 setting a supplemental enhancement information message for each of a base layer bitstream included in a bitstream and a combined base and enhancement layer bitstream included in the bitstream, for synchronization of removal times such that a number of bits that is present in the bitstream is counted to decode a particular set of bits of the bitstream; and   generating the bitstream including the supplemental enhancement information message, wherein
 the base layer bitstream and the combined base and enhancement layer bitstream include hypothetical reference decoder parameters for each layer, 
 the hypothetical reference decoder parameters comprise at least one of a bit rate or a Coded Picture Buffer (CPB) size, and 
 a first buffer for the base layer bitstream and a second buffer for the combined base and enhancement layer bitstream are managed independently based on respective hypothetical reference decoder parameters. 
   
     
     
         24 . The encoding method according to  claim 23 ,
 wherein the base layer bitstream utilizes a different profile than the combined base and enhancement layer bitstream.   
     
     
         25 . The encoding method according to  claim 23 ,
 wherein the bitstream indicates the at least one of the bit rate or the CPB size allocated for each of the base layer bitstream and the combined base and enhancement layer bitstream.   
     
     
         26 . An encoding system, comprising:
 at least one processor configured to:
 set a supplemental enhancement information message for each of a base layer bitstream included in a bitstream and a combined base and enhancement layer bitstream included in the bitstream, for synchronization of removal times such that a number of bits that is present in the bitstream is counted to decode a particular set of bits of the bitstream; and 
 generate the bitstream including the supplemental enhancement information message, wherein
 the base layer bitstream and the combined base and enhancement layer bitstream include hypothetical reference decoder parameters for each layer, 
 the hypothetical reference decoder parameters comprise at least one of a bit rate or a Coded Picture Buffer (CPB) size, and 
 a first buffer for the base layer bitstream and a second buffer for the combined base and enhancement layer bitstream are managed independently based on respective hypothetical reference decoder parameters. 
 
   
     
     
         27 . The encoding system according to  claim 26 ,
 wherein the base layer bitstream utilizes a different profile than the combined base and enhancement layer bitstream.   
     
     
         28 . The encoding system according to  claim 26 ,
 wherein the bitstream indicates the at least one of the bit rate or the CPB size allocated for each of the base layer bitstream and the combined base and enhancement layer bitstream.