Filter module for a video decoding system

• US 20040075768A1
• Filed: 03/11/2003
• Published: 04/22/2004
• Est. Priority Date: 10/22/2002
• Status: Active Grant

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Law, Patrick, Neuman, Darren, Baer, David
• Granted Patent: US 7,636,125 B2
• Time in Patent Office: Days
• US Class Current: 348/554
• CPC Class Codes: H04N 21/25808 Management of client data terminal profiles in network data switching protocols H04L67/303
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 5/14 Picture signal circuitry for video frequency region cameras or camera modules comprising electronic image sensors, or control thereof H04N23/00
• CPC Class Codes: H04N 7/012 Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229
• CPC Class Codes: H04N 9/641 Multi-purpose receivers, e.g. for auxiliary information H04N9/642 takes precedence

Abstract

Systems and methods are disclosed for filter modules in a video display system or network. One embodiment relates to a method for operating a filter module in a video display network comprising determining a picture type, display type and operation of the display network. The method further comprises determining, in real time, a filter configuration from a plurality of possible filter configurations based on the determined picture type, display type and operation.

Claims

1. A method of operating a filter module in a video display system comprising:

(a) determining a picture type of the display network;

(b) determining a display type of the display network;

(c) determining an operation of the display network; and

(d) determining, in real time, a filter configuration from a plurality of possible filter configurations based on the determination of steps (a)-(c).

2. The method of claim 1, wherein step (a) comprises determining if said picture type is frame based video, field based video or graphics.

3. The method of claim 1, wherein step (b) comprises determining if said display type is progressive or interlaced.

4. The method of claim 1, wherein step (c) comprises determining if said operation is at least no scaling, interpolation or decimation.

5. The method of claim 1, wherein the filter configuration in the filter module is determined in accordance with at least one register write instruction.

6. The method of claim 1, wherein the filter configuration in the filter module comprises at least an FIR filter.

7. The method of claim 6, wherein said FIR filter comprises a 2D polyphase FIR filter.

8. The method of claim 1, wherein the filter configuration in the filter module comprises using at least pre-filtering.

9. The method of claim 8, wherein said pre-filtering comprises using memory-to-memory decimation.

10. The method of claim 1, wherein the filter configuration in the filter module comprises using at least de-interlacing.

11. The method of claim 10, wherein said de-interlacing comprises using adaptive-temporal filtering.

12. The method of claim 1, wherein the filter configuration in the filter module comprises using at least an ARC filter.

13. The method of claim 12, wherein said ARC filter further comprises changing an aspect ratio of a graphics plane using horizontal scaling.

14. The method of claim 12, wherein said ARC filter comprises a 1D polyphase FIR filter.

15. The method of claim 1, wherein the filter configuration in the filter module comprises using at least one AFF filter.

16. The method of claim 15, wherein said AFF filter is adapted to filter a frame-based picture before said picture is displayed on an interlaced device.

17. The method of claim 15, wherein said AFF filter is a vertical low pass filter.

18. A method of operating a filter module in a video display system comprising:

(a) determining if a picture type of the display network is frame based video, field based video or graphics;

(b) determining if a display type of the display network is progressive or interlaced;

(c) determining if an operation of the display network is at least no scaling, interpolation or decimation; and

d) determining, in real time, a filter configuration from a plurality of possible filter configurations based on the determination of steps (a)-(c).

19. The method of claim 18, wherein the filter configuration in the filter module is determined in accordance with at least one register write.

20. The method of claim 18, wherein the filter configuration in the filter module comprises at least an FIR filter if said operation of the display network is interpolation.

21. The method of claim 18, wherein the filter configuration in the filter module comprises using at least pre-filtering in combination with an FIR filter if said operation of the display network is decimation.

22. A filter module used in a network for processing date, the filter module being adapted form at least one filter configuration in real time.

23. The filter module of claim 22 wherein the at least one filter configuration comprises no filters.

24. The filter module of claim 23 wherein the at least one filter configuration comprises at least one or more filters selected from a group consisting of an FIR filter, an ARC filter, an AFF filter, a prefiltering filter and an de-interlacing filter.

25. The filter module of claim 24 wherein said FIR filter comprises a 2D polyphase filter.