UNIFIED SYSTEM FOR PROGRESSIVE AND INTERLACED VIDEO TRANSMISSION

• US 20090185073A1
• Filed: 03/18/2009
• Published: 07/23/2009
• Est. Priority Date: 10/23/2003
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: MacInnis, Alexander G., Zhong, Sheng
• Granted Patent: US 8,170,099 B2
• Time in Patent Office: Days
• US Class Current: 348/448
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression
• CPC Class Codes: H04N 7/01 Conversion of standards , e.g. involving analogue television standards or digital television standards processed at pixel level
• CPC Class Codes: H04N 7/012 Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229

Abstract

A system and method that support both progressive and interlaced format video transmission and display. The system utilizes de-interlacing techniques to convert input interlaced format video to progressive format video, and compress and vertically scale the progressive format video to communicate videos more efficiently in a progressive format. The system also supports interlaced and progressive displays, where after decompressing and vertically resealing the communicated compressed progressive format video, the video may be converted to interlaced format if the display supports interlaced format video. The system is capable of dynamically switching between the progressive and the interlaced format modes.

Claims

1. A system that transmits and displays interlaced and progressive format input video, wherein the transmission is done in progressive format, and the displayed video has no perceptible loss of vertical and temporal resolution.

2. The system according to claim 1 further comprising an encoding end comprising:

at least one first element that converts an input video in interlaced format to video in progressive format; and

at least one second element that vertically scales down the video in progressive format.

3. The system according to claim 2 wherein the at least one first element utilizes a de-interlacing technique.

4. The system according to claim 2 wherein the at least one first element and the at least one second element comprise separate physical devices.

5. The system according to claim 2 wherein the at least one second element utilizes the Kell factor in vertically scaling down the video in progressive format.

6. The system according to claim 2 wherein the encoding end further comprises at least one third element that compresses the video in progressive format utilizing a compression technique.

7. The system according to claim 2 further comprising a decoding end, wherein the encoding end communicates the compressed video in progressive format to the decoding end.

8. The system according to claim 7 wherein the decoding end further comprises at least one fourth element that decompresses the communicated compressed video in progressive format.

9. The system according to claim 7 further comprising a display that receives an output from the decoding end.

10. The system according to claim 9 wherein the decompressed video in progressive format is displayed on the display.

11. The system according to claim 9 wherein the decoding end further comprises at least one fifth element that converts the decompressed video in progressive format to video in interlaced format for display.

12. A method for transmitting and displaying interlaced and progressive format input video, wherein the transmitting is done in progressive format, and the displayed video has no perceptible loss of at least one of vertical and temporal resolution, the method comprising:

converting input video to progressive format, if input video is in interlaced format; and

scaling down the video in progressive format vertically.

13. The method according to claim 12 wherein the converting utilizes a de-interlacing technique.

14. The method according to claim 12 further comprising decompressing the compressed video in progressive format.

15. The method according to claim 14 further comprising displaying the decompressed video in progressive format on a display that supports progressive format display.

16. The method according to claim 14 further comprising:

converting the decompressed video from progressive format to interlaced format; and

displaying the video in interlaced format on a display.

17. A system that transmits interlaced and progressive format input video, wherein the transmission is done in progressive format, the system comprising:

at least one first element that converts an input video in interlaced format to video in progressive format; and

at least one second element that vertically scales down the video in progressive format.

18. The system according to claim 17 wherein the at least one first element utilizes a de-interlacing technique.

19. The system according to claim 17 wherein the at least one second element utilizes the Kell factor in vertically scaling down the video in progressive format.

20. The system according to claim 17 further comprising at least one third element that compresses the video in progressive format utilizing a compression technique.

21. A system that receives interlaced and progressive format input video, wherein the received video is vertically scaled down and is in progressive format, the system comprising at least one first element that decompresses and vertically scales the received compressed video.

22. The system according to claim 21 wherein a display receives an output from the system.

23. The system according to claim 22 wherein the decompressed video in progressive format is displayed on the display.

24. The system according to claim 22 further comprising at least one second element that converts the decompressed video in progressive format to video in interlaced format and displays it on the display.

25. The system according to claim 24 wherein the display is an interlaced display.

26. The system according to claim 25 wherein the vertical height of the received progressive format video is greater than the vertical height of the interlaced display, and the width of the received progressive format video is greater than two-thirds of the width of the interlaced display.