Video rotation method and device

• US 20100060792A1
• Filed: 12/30/2008
• Published: 03/11/2010
• Est. Priority Date: 09/11/2008
• Status: Active Grant

• Current Assignee: Barry Corlett, David G. Conroy, Michael Culbert, Timothy J. Millet
• Original Assignee: Barry Corlett, David G. Conroy, Michael Culbert, Timothy J. Millet
• Inventors: Conroy, David G., Millet, Timothy J., Culbert, Michael, Corlett, Barry
• Granted Patent: US 8,610,830 B2
• Time in Patent Office: Days
• US Class Current: 348/583
• CPC Class Codes: H04N 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression

Abstract

A media processing system with an improved method and device for rotating a video image is provided. Embodiments of the media processing system include a video decoder with the ability to output decoded video in a landscape or portrait orientation. In some embodiments, the video output orientation is based on the physical orientation of the display as indicated by an electronic sensor.

Claims

1. A hand-held electronic device, comprising:

a video decoder configured to receive a compressed video signal and generate decompressed video data corresponding with a video image;

a frame buffer operatively coupled to the video decoder and configured to receive the decompressed video data from the video decoder; and

a video display operatively coupled to the frame buffer and configured to receive the decompressed video data from the frame buffer and generate the video image;

wherein the video decoder is configured to rotate the video image according to a specified image orientation.

2. The hand-held electronic device of claim 1, wherein the video decoder is configured to rotate the video image by sending the decompressed video data to the frame buffer in a rotated order.

3. The hand-held electronic device of claim 1, comprising a sensor configured to sense a physical orientation of the display, and wherein the specified image orientation is based on the physical orientation of the display as determined by the sensor.

4. The hand-held electronic device of claim 3, wherein the sensor comprises an accelerometer.

5. The hand-held electronic device of claim 1, wherein the frame buffer receives the decompressed video data from the video decoder in either a landscape or portrait image orientation.

6. The hand-held electronic device of claim 1, wherein the video decoder comprises a decoder engine configured to receive the compressed video signal and generate the decompressed video data, and an output buffer operatively coupled to the decoder engine and configured to receive the decompressed video data from the decoder engine and output the decompressed video data to the frame buffer.

7. The hand-held electronic device of claim 6, wherein the output buffer holds approximately one frame of the decompressed video data.

8. The hand-held electronic device of claim 6, wherein the video decoder comprises a programmable memory configured to determine an order by which to send decompressed video data from the output buffer to the frame buffer.

9. A video decoder, comprising:

a video decoder engine configured to receive a compressed video signal and generate decompressed video data corresponding with a video image;

an output buffer operatively coupled to the video decoder engine and configured to receive the decompressed video data from the video decoder engine; and

a programmable memory configured to calculate a transfer order depending on a specified video image orientation;

wherein the decompressed video data is transferred from the output buffer to a frame buffer according to the transfer order.

10. The video decoder of claim 9, comprising an input configured to receive the specified video image orientation.

11. The video decoder of claim 9, wherein the transfer order causes the video image to be rotated by ninety degrees.

12. The video decoder of claim 9, wherein the size of the output buffer is approximately equal to a size of the frame buffer.

13. The video decoder of claim 9, wherein the output buffer receives the decompressed video data from the video decoder engine in a landscape image orientation and outputs the decompressed video data in a portrait image orientation.

14. A method of processing video data, comprising:

obtaining decompressed video data from a video decoder, the decompressed video data corresponding with a video image;

storing the decompressed video data in a first block of memory operatively coupled to the video decoder;

determining an image orientation;

calculating a transfer order based on the image orientation; and

sending the video data from the first block of memory to a second block of memory according to the transfer order.

15. The method of claim 14, comprising determining a start-of-line parameter based on the image orientation.

16. The method of claim 14, wherein the transfer order causes the video image to be rotated ninety degrees.

17. The method of claim 14, wherein the transfer order causes the video image to be displayed in a portrait orientation.

18. The method of claim 14, wherein determining the image orientation comprises obtaining a signal from a sensor configured to determine a physical orientation of a display.

19. The method of claim 14, comprising sending the video data from the second block of memory to a display in the order in which the video data is held in the second block of memory.

20. The method of claim 14, comprising scaling the video data to fit the video image to the display.