SYSTEMS, APPARATUSES, AND METHODS FOR TRANSCODING A BITSTREAM

• US 20140334532A1
• Filed: 05/08/2013
• Published: 11/13/2014
• Est. Priority Date: 05/08/2013
• Status: Active Grant

• Current Assignee: Integrated Device Technology Incorporated (Renesas Electronics Corporation)
• Original Assignee: Magnum Semiconductor Incorporated (Renesas Electronics Corporation)
• Inventors: Pearson, Eric C.
• Granted Patent: US 10,341,673 B2
• Time in Patent Office: Days
• US Class Current: 375/240.02
• CPC Class Codes: H04N 19/40 using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
• CPC Class Codes: H04N 19/91 Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

Abstract

Examples of systems, apparatuses, and methods for to transcoding a bitstream are described herein. An example content distribution system may include an interconnect configured to provide encoded video data from an encoder to a decoder. The interconnect is configured to receive a bitstream including the encoded video data from the encoder. The bitstream is encoded using a first lossless coding methodology. The interconnect including a transcoder configured to transcode the bitstream using a second lossless coding methodology to provide a transcoded bitstream.

Claims

1. A content distribution system, comprising:

an interconnect configured to provide encoded video data from an encoder to a decoder, the interconnect configured to receive a bitstream including the encoded video data from the encoder, wherein the bitstream is encoded using a first lossless coding methodology, the interconnect comprising a transcoder configured to transcode the bitstream using a second lossless coding methodology to provide a transcoded bitstream.

2. The content distribution system of claim 1, wherein the transcoder is further configured to detect a coding methodology used to encode the bitstream, wherein the transcoder configured to transcode the bitstream using the second lossless coding methodology is responsive to detecting that the encoded bitstream is encoded using the first lossless coding methodology.

3. The content distribution system of claim 2, wherein the transcoder is further configured to skip transcoding the bitstream responsive to detecting that the bitstream is encoded using a coding methodology other than the first lossless coding methodology.

4. The content distribution system of claim 1, wherein the interconnect further comprises a second transcoder configured to transcode the transcoded bitstream using the first lossless coding methodology to provide a second transcoded bitstream.

5. The content distribution system of claim 4, wherein the second transcoder is further configured to skip transcoding of the transcoded bitstream responsive to an indication that the decoder is capable of decoding using the second lossless coding methodology.

6. The content distribution system of claim 5, wherein the second transcoder is further configured to receive the indication that the decoder is capable of decoding using the second lossless coding methodology from the decoder.

7. The content distribution system of claim 1, wherein the interconnect further comprises a transport stream configured to provide the transcoded bitstream from the first encoder to the second encoder.

8. The content distribution system of claim 1, wherein the transcoder comprises:

one or more processing units configured to extract an elementary bitstream from the bitstream, the one or more processing units further configured to insert a transcoded elementary bitstream into the transcoded bitstream, wherein the elementary bitstream and the transcoded elementary bitstream each include the encoded video data, wherein the elementary bitstream is encoded using the first lossless coding methodology; and

an entropy engine configured to transcode the elementary bitstream using the second lossless coding methodology to provide the transcoded elementary bitstream.

9. The content distribution system of claim 1, wherein the first lossless coding methodology is a non-arithmetic coding methodology, and wherein the second lossless coding methodology is an arithmetic coding methodology.

10. The content distribution system of claim 1, wherein the first lossless coding methodology is a context-adaptive variable length coding methodology, and wherein the second lossless coding methodology is a context-adaptive binary arithmetic coding methodology.

11. The content distribution system of claim 1, wherein the encoder is unable to encode the bitstream using the second coding methodology.

12. The content distribution system of claim 11, wherein the transcoded bitstream requires less bandwidth for transport to the decoder than the bitstream provided by the encoder.

13. A method, comprising:

receiving, at an interconnect, a bitstream encoded using a first lossless coding methodology; and

transcoding the bitstream using a second lossless coding methodology to provide a transcoded bitstream.

14. The method of claim 13, further comprising detecting a coding methodology used to encode the bitstream, wherein transcoding the bitstream using the second lossless coding methodology to provide the transcoded bitstream is responsive to detecting that the bitstream is encoded using the first lossless coding methodology.

15. The method of claim 14, further comprising skipping the transcode of the bitstream using the second lossless coding methodology responsive to detecting that the bitstream is encoded using a coding methodology other than the first lossless coding methodology.

16. The method of claim 13, further comprising transcoding the transcoded bitstream using the first lossless coding methodology to provide a second transcoded bitstream.

17. The method of claim 16, further comprising skipping the transcode of the transcoded bitstream using the first lossless coding methodology responsive to an indication that a decoder configured to receive the transcoded bitstream is capable of decoding using the second lossless coding methodology.

18. The method of claim 16, further comprising:

detecting a coding methodology used to encode the transcoded bitstream, wherein transcoding the transcoded bitstream using the first lossless coding methodology is responsive to detecting that the transcoded bitstream is encoded using the second lossless coding methodology; and

skipping the transcode of the transcoded bitstream using the first lossless coding methodology responsive to detecting that the transcoded bitstream is encoded using a coding methodology other than the second lossless coding methodology.

19. The method of claim 13, wherein the first lossless coding methodology is a context-adaptive variable length coding methodology, and wherein the second lossless coding methodology is a context-adaptive binary arithmetic coding methodology.

20. The method of claim 13, wherein the encoder which generated the bitstream is unable to encode the bitstream using the second coding methodology.

21. The method of claim 20, wherein the transcoded bitstream requires less bandwidth for transport to a decoder than the bitstream provided by the encoder.