Method and system for high speed video encoding using parallel encoders
In a video processing system, a method and system for high speed video encoding using parallel encoders are provided. A delimiter may break up a video sequence into encoding groups that are transferred to a plurality of parallel encoders. The parallel encoders may process and transfer intra-coded pictures in the encoding groups to previous parallel encoders or may process and transfer last predictive pictures to next parallel encoders. When intra-coded pictures are transferred, the encoding group may correspond to that of a GOP structure. When predictive pictures are transferred, the encoding group may end in at least one bidirectional-predictive picture. The parallel encoders process the transferred intra-coded pictures or transferred predictive pictures to generate a plurality of parallel outputs. An assembler assembles an encoded video output from the parallel outputs based on timing information. A controller controls the operation of the delimiter, the parallel encoders, and the assembler.
1 . A method for video compression, the method comprising:
transferring a plurality of encoding groups into a plurality of parallel encoders;
processing in said plurality of parallel encoders a plurality of intra-coded pictures in said plurality of encoding groups;
transferring said processed plurality of intra-coded pictures to a plurality of previous parallel encoders;
generating a plurality of parallel outputs based on said transferred processed plurality of intra-coded pictures and said transferred plurality of encoding groups; and
assembling said generated plurality of parallel outputs into an encoded video output.
2 . The method according to claim 1 , wherein at least one encoding group in said plurality of encoding groups corresponds to a GOP structure.
3 . The method according to claim 1 , further comprising transferring consecutive encoding groups in said plurality of encoding groups into consecutive parallel encoders in said plurality of parallel encoders.
4 . The method according to claim 1 , further comprising indicating to a first parallel encoder in said plurality of parallel encoders that a first of said plurality of encoding groups is transferred to said first parallel encoder for processing.
5 . The method according to claim 1 , further comprising encoding said plurality of intra-coded pictures during said processing of said plurality of intra-coded pictures in said plurality of parallel encoders.
6 . The method according to claim 5 , further comprising decoding said transferred processed plurality of intra-coded pictures in said plurality of previous parallel encoders before generating said plurality of parallel outputs.
7 . The method according to claim 1 , further comprising encoding and reconstructing said plurality of intra-coded pictures during said processing of said plurality of intra-coded pictures in said plurality of parallel encoders.
8 . A method for video compression, the method comprising:
delimiting a GOP sequence into a plurality of encoding groups;
transferring said plurality of encoding groups into a plurality of parallel encoders;
processing in said plurality of parallel encoders a plurality of last predictive pictures in said plurality of encoding groups;
transferring said processed plurality of last predictive pictures to a plurality of next parallel encoders;
generating a plurality of parallel outputs based on said transferred processed plurality of last predictive pictures and said transferred plurality of encoding groups; and
assembling said generated plurality of parallel outputs into an encoded video output.
9 . The method according to claim 8 , wherein at least one encoding group in said plurality of encoding groups ends in at least one bidirectional-predictive picture.
10 . The method according to claim 8 , further comprising transferring consecutive encoding groups in said plurality of encoding groups into consecutive parallel encoders in said plurality of parallel encoders.
11 . The method according to claim 8 , further comprising encoding said plurality of last predictive pictures during said processing of said plurality of last predictive pictures in said plurality of parallel encoders.
12 . The method according to claim 11 , further comprising decoding said transferred processed plurality of last predictive pictures in said plurality of next parallel encoders before generating said plurality of parallel outputs.
13 . The method according to claim 8 , further comprising encoding and reconstructing said plurality of last predictive pictures during said processing of said plurality of last predictive pictures in said plurality of parallel encoders.
14 . A system for video compression, the system comprising:
a delimiter that transfers a plurality of encoding groups into a plurality of parallel encoders;
said plurality of parallel encoders process a plurality of intra-coded pictures in said plurality of encoding groups;
said plurality of parallel encoders transfer said processed plurality of intra-coded pictures to a plurality of previous parallel encoders;
said plurality of previous parallel encoders generate a plurality of parallel outputs based on said transferred processed plurality of intra-coded pictures and said transferred plurality of encoding groups; and
an assembler that assembles said generated plurality of parallel outputs into an encoded video output.
15 . The system according to claim 14 , wherein said delimiter delimits a GOP sequence so that at least one encoding group in said plurality of encoding groups corresponds to a GOP structure.
16 . The system according to claim 14 , wherein said delimiter transfers consecutive encoding groups in said plurality of encoding groups into consecutive parallel encoders in said plurality of parallel encoders.
17 . The system according to claim 14 , wherein a controller indicates to a first parallel encoder in said plurality of parallel encoders that a first of said plurality of encoding groups is transferred to said first parallel encoder for processing.
18 . The system according to claim 14 , wherein said plurality of parallel encoders encode said plurality of intra-coded pictures during said processing of said plurality of intra-coded pictures.
19 . The system according to claim 18 , wherein said plurality of previous parallel encoders decode said transferred processed plurality of intra-coded pictures before generating said plurality of parallel outputs.
20 . The system according to claim 18 , wherein said plurality of parallel encoders encode and reconstruct said plurality of intra-coded pictures during said processing of said plurality of intra-coded pictures.
21 . A system for video compression, the system comprising:
a delimiter that delimits a GOP sequence into a plurality of encoding groups;
said delimiter transfers said plurality of encoding groups into a plurality of parallel encoders;
said plurality of parallel encoders process a plurality of last predictive pictures in said plurality of encoding groups;
said plurality of parallel encoders transfer said processed plurality of last predictive pictures to a plurality of next parallel encoders;
said plurality of next parallel encoders generate a plurality of parallel outputs based on said transferred processed plurality of last predictive pictures and said transferred plurality of encoding groups; and
an assembler that assembles said generated plurality of parallel outputs into an encoded video output.
22 . The system according to claim 21 , wherein said delimiter delimits a GOP sequence so that at least one encoding group in said plurality of encoding groups ends in at least one bidirectional-predictive picture.
23 . The system according to claim 21 , wherein said delimiter transfers consecutive encoding groups in said plurality of encoding groups into consecutive parallel encoders in said plurality of parallel encoders.
24 . The system according to claim 21 , wherein said plurality of parallel encoders encode said plurality of last predictive pictures during said processing of said plurality of last predictive pictures.
25 . The system according to claim 24 , wherein said plurality of next parallel encoders decode said transferred processed plurality of last predictive pictures before generating said plurality of parallel outputs.
26 . The system according to claim 21 , wherein said plurality of parallel encoders encode and reconstruct said plurality of last predictive pictures during said processing of said plurality of last predictive pictures.
27 . A method for video compression, the method comprising:
parallel processing a plurality of intra-coded pictures in a plurality of encoding groups;
generating a plurality of parallel outputs based on said parallel processed plurality of intra-coded pictures and said plurality of encoding groups; and
assembling said generated plurality of parallel outputs into an encoded video output.
28 . The method according to claim 27 , wherein at least one encoding group in said plurality of encoding groups corresponds to a GOP structure.
29 . The method according to claim 27 , further comprising transferring consecutive encoding groups in said plurality of encoding groups into a plurality of consecutive parallel encoders.
30 . The method according to claim 27 , further comprising indicating to a first parallel encoder that a first of said plurality of encoding groups is transferred to said first parallel encoder for processing.
31 . The method according to claim 27 , further comprising encoding and decoding said plurality of intra-coded pictures before generating said plurality of parallel outputs.
32 . The method according to claim 27 , further comprising encoding, decoding, and reconstructing said plurality of intra-coded pictures before generating said plurality of parallel outputs.
33 . The method according to claim 27 , further comprising assembling said encoded video output based on timing information provided by said generated plurality of parallel outputs.