Recording Streaming Delta-Encoded Data

• US 20090238262A1
• Filed: 03/18/2008
• Published: 09/24/2009
• Est. Priority Date: 03/18/2008
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Miceli, Sean
• Granted Patent: US 8,126,048 B2
• Time in Patent Office: Days
• US Class Current: 375/240.20
• CPC Class Codes: H04N 21/4325 by playing back content from the storage medium reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/6437 Real-time Transport Protocol [RTP]
• CPC Class Codes: H04N 21/8455 involving pointers to the content, e.g. pointers to the I-frames of the video stream
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/82 the individual colour picture signal components being recorded simultaneously only
• CPC Class Codes: H04N 9/8227 the additional signal being at least another television signal

Abstract

Apparatus having corresponding methods, computer-readable media, and data structures comprise an input circuit adapted to receive a stream of delta-encoded data; a record circuit adapted to store the stream of delta-encoded data in a stream file; a current frame circuit adapted to maintain a current frame of the data based on the stream of delta-encoded data; a record frame circuit adapted to store the current frame in a frame file as an intraframe with a frame pointer at a plurality of different index times, wherein each frame pointer indicates a location in the stream file associated with the respective index time; and a record index circuit adapted to store the index times sequentially in an index file, and adapted to store an index pointer for each index time, wherein each index pointer indicates a location in the frame file of the intraframe associated with the respective index time.

Claims

1. An apparatus comprising:

an input circuit adapted to receive a stream of delta-encoded data;

a record circuit adapted to store the stream of delta-encoded data in a stream file;

a current frame circuit adapted to maintain a current frame of the data based on the stream of delta-encoded data;

a record frame circuit adapted to store the current frame in a frame file as an intraframe with a frame pointer at a plurality of different index times, wherein each frame pointer indicates a location in the stream file associated with the respective index time; and

a record index circuit adapted to store the index times sequentially in an index file, and adapted to store an index pointer for each index time, wherein each index pointer indicates a location in the frame file of the intraframe associated with the respective index time.

2. The apparatus of claim 1:

wherein the stream of delta-encoded data includes a plurality of packets of video data; and

wherein the record circuit stores the packets in the stream file.

3. The apparatus of claim 2, wherein the video data complies with at least one of:

one or more of the Video Coding Experts Group (VCEG) standards; and

one or more of the Moving Picture Experts Group (MPEG) standards.

4. The apparatus of claim 2:

wherein the stream of delta-encoded data includes a plurality of real-time protocol (RTP) packets, wherein each RTP packet includes at least a portion of one of the packets of the video data; and

wherein the record circuit stores the RTP packets in the stream file.

5. The apparatus of claim 4:

wherein the RTP packets are received using transmission control protocol/Internet protocol (TCP/IP).

6. An apparatus comprising:

input means for receiving a stream of delta-encoded data;

recording means for storing the stream of delta-encoded data in a stream file;

current frame means for maintaining a current frame of the data based on the stream of delta-encoded data;

record frame means for storing the current frame in a frame file as an intraframe with a frame pointer at a plurality of different index times, wherein each frame pointer indicates a location in the stream file associated with the respective index time; and

record index means for storing the index times sequentially in an index file, and for storing an index pointer for each index time, wherein each index pointer indicates a location in the frame file of the intraframe associated with the respective index time.

7. The apparatus of claim 6:

wherein the stream of delta-encoded data includes a plurality of packets of video data; and

wherein the means for recording stores the packets in the stream file.

8. The apparatus of claim 7, wherein the video data complies with at least one of:

one or more of the Video Coding Experts Group (VCEG) standards; and

one or more of the Moving Picture Experts Group (MPEG) standards.

9. The apparatus of claim 7:

wherein the stream of delta-encoded data includes a plurality of real-time protocol (RTP) packets, wherein each RTP packet includes at least a portion of one of the packets of the video data; and

wherein the record circuit stores the RTP packets in the stream file.

10. The apparatus of claim 9:

wherein the RTP packets are received using transmission control protocol/Internet protocol (TCP/IP).

11. Computer-readable media embodying instructions executable by a computer to perform a method comprising:

receiving a stream of delta-encoded data;

storing the stream of delta-encoded data in a stream file;

maintaining a current frame of the data based on the stream of delta-encoded data;

storing the current frame in a frame file as an intraframe with a frame pointer at a plurality of different index times, wherein each frame pointer indicates a location in the stream file associated with the respective index time; and

storing the index times sequentially in an index file, and for storing an index pointer for each index time, wherein each index pointer indicates a location in the frame file of the intraframe associated with the respective index time.

12. The computer-readable media of claim 11:

wherein the stream of delta-encoded data includes a plurality of packets of video data; and

wherein the method further comprises storing the packets in the stream file.

13. The computer-readable media of claim 12, wherein the video data complies with at least one of:

one or more of the Video Coding Experts Group (VCEG) standards; and

one or more of the Moving Picture Experts Group (MPEG) standards.

14. The computer-readable media of claim 12:

wherein the stream of delta-encoded data includes a plurality of real-time protocol (RTP) packets, wherein each RTP packet includes at least a portion of one of the packets of the video data; and

wherein the method further comprising storing the RTP packets in the stream file.

15. The computer-readable media of claim 14:

wherein the RTP packets are received using transmission control protocol/Internet protocol (TCP/IP).

16. A data structure embodied in a computer-readable storage medium, the data structure comprising:

a stream file comprising a stream of delta-encoded data;

a frame file comprising

a plurality of intraframes each representing the delta-encoded data preceding a different index time, and

a frame pointer for each of the intraframes, wherein each frame pointer indicates a location in the stream file for the index time corresponding to the respective intraframe; and

an index file comprising

the index times arranged in sequence, and

an index pointer for each of the index times, wherein each index pointer indicates a location in the frame file for the intraframe corresponding to the respective index time.

17. The data structure of claim 16:

wherein the stream of delta-encoded data includes a plurality of packets of video data.

18. The data structure of claim 17, wherein the video data complies with at least one of:

one or more of the Video Coding Experts Group (VCEG) standards; and

one or more of the Moving Picture Experts Group (MPEG) standards.

19. The data structure of claim 17:

wherein the stream of delta-encoded data includes a plurality of real-time protocol (RTP) packets, wherein each RTP packet includes at least a portion of one of the packets of the video data.