Granted Patent B2

US 8,264,611 · App. 12/748,391 · Granted Sep 11, 2012

Abstract

Claims (41)

1. A system for downscaling video signal data to an arbitrary size, said system comprising:

an antenna receiving video signal data;

an analog-to-digital converter coupled to said antenna and converting said received analog signal data to digital signal data;

a memory component storing video downscaling instructions; and

a video downscaling processor, coupled to said memory component and said analog-to-digital converter, wherein said video downscaling processor, upon reading said video downscaling instructions from said memory component and executing said downscaling instructions:

divides said digital video signal data into a plurality of blocks, wherein each block comprises a plurality of pixel elements; and

cycles through said plurality of blocks, and for every block in said plurality of blocks, generates a new block, wherein said new block comprises a plurality of new pixels evenly spaced within said new block,

wherein each said pixel element from said plurality of pixel elements comprises a pixel pair and each new pixel in said plurality of new pixels is generated from said pixel pair, and

wherein said new pixel is calculated as (1−d)*M 1 +d*M 2 , where M 1 is a first pixel of said pixel pair, M 2 is a second pixel of said pixel pair and d is a calculated distance from a start point of said pixel pair.

2. The system of claim 1 , wherein said plurality of blocks comprises a single horizontal line, as transmitted according to at least one of National Television System Committee (NTSC) standard of analog video signal data transmission, Phase Alternate Line (PAL) standard of analog video signal data transmission, and Sequential Color with Memory (SECAM) standard of video signal data transmission.

3. The system of claim 1 , wherein said calculated distance from said start point is a calculated distance from a first pixel of said pixel pair.

4. The system of claim 3 , wherein said calculated distance from said start point depends on a precalculated value r and said precalculated value r is calculated as q/p −1where q is a number of pixels in said block and p is a number of pixels in a new block.

5. The system of claim 4 , wherein said calculated distance from said start point depends on said precalculated value r as (d+r), where d is said calculated distance from said start point.

6. The system of claim 5 , wherein said video downscaling processor skips to another pixel pair when d>1, where d is said calculated distance from said start point.

7. The system of claim 1 , further comprising an anti-aliasing filter coupled to the downscaling processor, wherein said anti-aliasing filter filters said digital video signal data to produce filtered video signal data and remove an aliasing effect of said digital video signal, wherein the removal of said aliasing effect is a prerequisite for said downscaling.

8. The system of claim 7 , wherein said video downscaling processor is coupled to said anti-aliasing filter, and wherein upon reading said video downscaling instructions from said memory component and executing said downscaling instructions, said video downscaling processor downscales said filtered video signal data.

9. The system of claim 1 , wherein said video downscaling processor comprises a digital signal processor.

10. A system for downscaling video signal data to an arbitrary size, said system comprising:

an antenna receiving video signal data;

an analog-to-digital converter coupled to said antenna and converting said received analog signal data to digital signal data;

a memory component storing video downscaling instructions; and

a video downscaling processor, coupled to said memory component and said analog-to-digital converter, wherein said video downscaling processor, upon reading said video downscaling instructions from said memory and executing said downscaling instructions:

divides said digital video signal data into a plurality of blocks, wherein each block comprises a plurality of pixel elements; and

cycles through said plurality of blocks, and for every block in said plurality of blocks, generates a new block, wherein said new block comprises a plurality of new pixels evenly spaced within said new block,

wherein said plurality of blocks comprises a vertical block of horizontal lines as transmitted according to at least one of National Television System Committee (NTSC) standard of analog video signal data transmission, Phase Alternate Line (PAL) standard of analog video signal data transmission, and Sequential Color with Memory (SECAM) standard of video signal data transmission, and

wherein each said pixel element from said plurality of pixel elements comprises a horizontal line pair and each new pixel in said plurality of new pixels is generated from said horizontal line pair.

11. The system of claim 10 , wherein each new pixel in said plurality of new pixels is calculated as (1−d)*L 1 +d*L 2 , where L 1 is a first horizontal line of said horizontal line pair, L 2 is a second horizontal line of said horizontal line pair and d is a calculated distance from the first line of said horizontal pair.

12. The system of claim 10 , further comprising an anti-aliasing filter coupled to the downscaling processor, wherein said anti-aliasing filter filters said digital video signal data to produce filtered video signal data and remove an aliasing effect of said digital video signal, wherein the removal of said aliasing effect is a prerequisite for said downscaling.

13. The system of claim 12 , wherein said video downscaling processor is coupled to said anti-aliasing filter, and wherein upon reading said video downscaling instructions from said memory component and executing said downscaling instructions, said video downscaling processor downscales said filtered video signal data.

14. The system of claim 10 , wherein said video downscaling processor comprises a digital signal processor.

15. The method of claim 14 , wherein the removal of said aliasing effect permits the downscaling of said video signal data.

16. A method of downscaling video signal data to produce evenly spaced downscaled video signal data, said method comprising:

providing video signal data;

dividing said video signal data into a plurality of blocks, where each block comprises a plurality of pixel-block pairs;

cycling through said plurality of blocks, and for every block in said plurality of blocks, generates a new block, wherein said new block comprises a plurality of new pixel-block pairs spaced within said new block; and

calculating, for each pixel-block pair in said plurality of pixel-block pairs, a new pixel-block from said pixel-block pair,

wherein said new pixel-block is calculated as (1−d)*M 1 +d*M 2 , where M 1 is a first pixel-block of said pixel-block pair, M 2 is a second pixel-block of said pixel-block pair and d is a calculated distance from a start point of said pixel-block pair.

17. The method of claim 16 , wherein said calculated distance from said start point depends on a precalculated value r and said precalculated value r is calculated as q/p −1, where q is a number of lines in said block and p is a number of lines in a new block.

18. The method of claim 16 , wherein said plurality of blocks comprises a single horizontal line, as transmitted according to at least one of National Television System Committee (NTSC) standard of analog video signal data transmission, Phase Alternate Line (PAL) standard of analog video signal data transmission, and Sequential Color with Memory (SECAM) standard of analog video signal data transmission.

19. The method of claim 16 , wherein said plurality of blocks comprises a vertical block of horizontal lines as transmitted according to at least one of National Television System Committee (NTSC) standard of analog video signal data transmission, Phase Alternate Line (PAL) standard of analog video signal data transmission, and Sequential Color with Memory (SECAM) standard of analog video signal data transmission, and a pixel-block comprises a single horizontal line.

20. The method of claim 16 , further comprising filtering said digital video signal data to produce filtered video signal data and remove an aliasing effect of said digital video signal.

Assignments (23)