Method and apparatus for thumbnail generation for a video device

Patent metadata

Field	Value
Publication number	US-12022092-B2
Application number	US-202318320158-A
Country	US
Kind code	B2
Filing date	May 18, 2023
Priority date	Jan 5, 2021
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

An example method includes the steps of receiving an encoded video packet including a packet header and generating a modified packet header. The modified packet header is generated by setting a first value in the packet header to indicate zero reference frames, and by setting a second value in the packet header designating an i-frame as unused for reference. The i-frame is decoded in response to the modified packet header to extract the i-frame without caching the i-frame in a decoded picture buffer. A thumbnail image is generated and includes an image from the i-frame. The thumbnail image is stored directly in memory.

First claim

The invention claimed is:

1. A method for generating a thumbnail image comprising:
receiving an encoded video packet including a packet header and an i-frame;
generating a modified packet header by setting a first value in the packet header to indicate zero reference frames, and by setting a second value in the packet header designating the i-frame as unused for reference, wherein the first value and the second value in the modified packet header cause a decoder to avoid caching the i-frame in a decoded picture buffer;
decoding the i-frame in response to the modified packet header to extract the i-frame;
generating the thumbnail image comprising an image from the i-frame; and
storing the thumbnail image directly in a memory in response to the first value and the second value of the modified packet header.

2. The method of claim 1 , further comprising concatenating a first field and a second field to generate the i-frame.

3. The method of claim 1 , further comprising displaying the thumbnail image in response to a search request.

4. The method of claim 1 , wherein the encoded video packet is encoded according to H.264 standards.

5. The method of claim 1 , wherein setting the first value in the packet header to indicate zero reference frames comprises:
setting a value of max_num_ref_frames to zero.

6. The method of claim 1 , wherein setting the second value in the packet header designating the i-frame as unused for reference comprises:
setting a value of memory_management_control_operation to avoid caching the i-frame in the decoded picture buffer.

7. The method of claim 1 , wherein generating the thumbnail image further comprises:
scaling the i-frame to reduce a resolution of the thumbnail image.

8. A method comprising:
receiving an encoded video packet including a packet header;
generating a modified packet header by setting a first value in the packet header to indicate zero reference frames, and by setting a second value in the packet header designating an i-frame as unused for reference;
decoding the i-frame in response to the modified packet header to extract the i-frame without caching the i-frame in a decoded picture buffer;
generating a thumbnail image comprising an image from the i-frame; and
storing the thumbnail image directly in a memory.

9. The method of claim 8 , wherein the first value and the second value in the modified packet header cause a decoder to avoid caching the i-frame in the decoded picture buffer.

10. The method of claim 8 , further comprising combining a first field and a second field to generate the i-frame.

11. The method of claim 8 , further comprising displaying the thumbnail image in response to a search request.

12. The method of claim 8 , wherein the encoded video packet is encoded according to H.264 standards.

13. The method of claim 8 , wherein setting the first value in the packet header to indicate zero reference frames comprises:
setting a value of max_num_ref_frames to zero.

14. The method of claim 8 , wherein setting the second value in the packet header designating the i-frame as unused for reference comprises:
setting a value of memory_management_control_operation to avoid caching the i-frame in the decoded picture buffer.

15. The method of claim 8 , wherein generating the thumbnail image further comprises:
scaling the i-frame to reduce a resolution of the thumbnail image.

16. A video device comprising a processor in electronic communication with a non-transitory memory configured to store instructions that, when executed by the processor, cause the processor to perform operations, the operations comprising:
receiving an encoded video packet including a packet header;
generating a modified packet header by setting a first value in the packet header to indicate zero reference frames, and by setting a second value in the packet header designating an i-frame as unused for reference;
decoding the i-frame in response to the modified packet header to extract the i-frame without caching the i-frame in a decoded picture buffer;
generating a thumbnail image comprising an image from the i-frame; and
storing the thumbnail image directly in a memory.

17. The video device of claim 16 , wherein the first value and the second value in the modified packet header cause a decoder to avoid caching the i-frame in the decoded picture buffer.

18. The video device of claim 16 , wherein the encoded video packet is encoded according to H.264 standards.

19. The video device of claim 16 , wherein setting the first value in the packet header to indicate zero reference frames comprises:
setting a value of max_num_ref_frames to zero.

20. The video device of claim 16 , wherein setting the second value in the packet header designating the i-frame as unused for reference comprises:
setting a value of memory_management_control_operation to avoid caching the i-frame in the decoded picture buffer.

Assignees

• Dish Network Technologies India Pvt Ltd

Inventors

• Vensiyani Abhilash Magan
• Raikar Yatish Jayant Naik
• Tripathi Varunkumar B
• Devaraj Vivek

Classifications

• H04N19/423

  characterised by memory arrangements (H04N19/433 takes precedence) · CPC title

• H04N19/188

  the unit being a video data packet, e.g. a network abstraction layer [NAL] unit · CPC title

• H04N19/172

  the region being a picture, frame or field · CPC title

• H04N19/16

  for a given display mode, e.g. for interlaced or progressive display mode · CPC title

• H04N19/12

  Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264 · CPC title