Reconstructed frame caching

• US 7,733,962 B2
• Filed: 12/08/2003
• Issued: 06/08/2010
• Est. Priority Date: 12/08/2003
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Nayak, Niranjan S., Lin, Chih-lung Bruce, Howell, Gareth Alan, Dunbar, Geoffrey T., Weiss, Rebecca C., Mohammed, Sohail Baig, Holcomb, Thomas W., Colle, Olivier
• Primary Examiner(s): Philippe; Gims S
• Application Number:
  US10/730,534
• Publication Number:
  US 20060184684A1
• Time in Patent Office: 2,374 Days
• Field of Search: 375/240.25, 375/240.28, 382/132, 709/224, 714/48, 345/473, 704/201, 386/111, 386/124
• US Class Current: 375/240.25
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D

Abstract

Systems and methods for processing input media in a computing device are described. In one aspect, a reconstructed frame is cached according to a set of criteria. A request to scrub to a predictive frame of input media is received. Responsive to receiving the request, the predictive frame is decoded starting with the reconstructed frame.

Claims

1. A computing device for processing input media, the computing device comprising:

a processor; and

a physical memory coupled to the processor, the memory comprising computer-program instructions executable by the processor for;

during playback of a media stream, caching a reconstructed frame according to a plurality of criteria, wherein the reconstructed frame comprises a decoded multimedia content frame, and wherein the criteria for caching the reconstructed frame is based on;

a detected display device resolution,

repeated requests for similar frames of input media,

an indication that a playback application has reverse playback capability, and

a received request from a playback application to play a given section of content in reverse;

receiving a request to scrub to a predictive frame of input media, the predictive frame following an intracoded frame within a group of pictures; and

decoding the predictive frame starting with the reconstructed frame.

2. A computing device as recited in claim 1, wherein the caching is by a media engine, a media processor, a media decoder, or an effect transform component of a media pipeline.

3. A computing device as recited in claim 1, wherein the request to scrub is sent by an application that is independent of a media processing pipeline, and wherein the criteria is further based on periodic time intervals, decoded frame size, available system memory, a requested playback rate, a detected display device resolution, and a determination that the application repeatedly requests similar frames of input media.

4. A computing device as recited in claim 1, wherein the caching is by a component in a media pipeline.

5. A computing device as recited in claim 1, wherein responsive to receiving the request and before decoding, the computer-program instructions further comprise instructions for:

determining that there is a cached reconstructed frame representing a complete decoded version of an inter-frame of the input media, the cached reconstructive frame being associated with a time less than or equal to a time of the predictive frame; and

wherein the cached reconstructed frame is the reconstructed frame.

6. A computing device as recited in claim 5, wherein the request is sent by an application that is independent of a media processing pipeline and wherein the reconstructed frame is a latest reconstructed frame in a timeline specified by the input media or the application.

7. A computing device as recited in claim 1, wherein the request is sent by an application that is independent of a media processing pipeline, and wherein the application enables reconstructed frame caching.

8. A computing device as recited in claim 1, wherein the request is sent by an application that is independent of a media processing pipeline, and wherein the computer-program instructions further comprise receiving, from the application, a location in the media processing pipeline to implement the reconstructed frame caching.

9. A computing device as recited in claim 8, wherein the location is subsequent to an effect transform component that operates on decoded frames of the input media.

10. A computing device as recited in claim 8, wherein the location is immediately subsequent to a media decoding module.