CACHING IN DIGITAL VIDEO PROCESSING APPARATUS

• US 20030001827A1
• Filed: 07/29/1999
• Published: 01/02/2003
• Est. Priority Date: 07/31/1998
• Status: Active Grant

• Current Assignee: Sony United Kingdom Limited (Sony Group Corp.)
• Original Assignee: Sony United Kingdom Limited (Sony Group Corp.)
• Inventors: GOULD, ANTONY JAMES
• Granted Patent: US 6,529,200 B2
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G06F 12/0888 using selective caching, e.g. bypass
• CPC Class Codes: G06T 1/60 Memory management
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text

Abstract

Video processing apparatus in which successive video processing operations are applied to images of a video signal to generate corresponding processing results in the form of images or data comprises a cache store for storing, as cached items and processing results associated with the video processing operations; and means for deleting currently cached items to provide cache space for items to be newly cached, the deleting means operating so that non-image processing results are retained in the cache for longer than processing results in the form of images.

Claims

1. Video processing apparatus in which successive video processing operations are applied to images of a video signal to generate corresponding processing results in the form of images or data, said apparatus comprising:

a cache store for storing, as cached items and processing results associated with said video processing operations; and

means for deleting currently cached items to provide cache space for items to be newly cached, said deleting means operating so that non-image processing results are retained in said cache for longer than processing results in said form of images.

2. Apparatus according to claim 1, in which said deleting means is operable not to delete non-image processing results from said cache.

3. Apparatus according to claim 1, in which said deleting means is operable not to delete processing parameters from said cache.

4. A method of video processing in which successive video processing operations are applied to images of a video signal to generate corresponding processing results in said form of images or data, said method comprising said steps of:

storing, as cached items and processing results associated with said video processing operations; and

deleting currently cached items to provide cache space for items to be newly cached, so that non-image processing results are retained in said cache for longer than processing results in said form of images.