VIDEO PROCESSING APPARATUS CAPABLE OF GENERATING OUTPUT VIDEO PICTURES/SEQUENCE WITH COLOR DEPTH DIFFERENT FROM COLOR DEPTH OF ENCODED VIDEO BITSTREAM

• US 20160323589A1
• Filed: 07/13/2016
• Published: 11/03/2016
• Est. Priority Date: 12/25/2012
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Chang, Yung-Chang
• Granted Patent: US 9,888,251 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 19/105 Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
• CPC Class Codes: H04N 19/117 Filters, e.g. for pre-processing or post-processing sub-band filter banks H04N19/635
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/139 Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
• CPC Class Codes: H04N 19/182 the unit being a pixel
• CPC Class Codes: H04N 19/186 the unit being a colour or a chrominance component
• 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 19/86 involving reduction of coding artifacts, e.g. of blockiness

Abstract

A video processing apparatus includes a control unit, a storage device, a video decoder and a video processor. The control unit is arranged for generating a color depth control signal. The video decoder is coupled to the storage device and the control unit, and arranged for referring to the color depth control signal to enable a target video decoding mode selected from a plurality of supported video decoding modes respectively corresponding to different output color depths, and decoding an encoded video bitstream under the target video decoding mode to generate decoded video pictures (sequence) to the storage device. The video processor is coupled to at least the storage device, and arranged for processing picture data derived from the data buffered in the storage device to generate output video pictures (sequence) to a display apparatus.

Claims

1. A video processing apparatus, comprising:

a control unit, arranged for generating a color depth control signal;

a storage device;

a video decoder, coupled to the storage device and the control unit, the video decoder arranged for referring to the color depth control signal to enable a target video decoding mode selected from a plurality of supported video decoding modes respectively corresponding to different output color depths, and decoding an encoded video bitstream under the target decoding mode to generate decoded video pictures (sequence) to the storage device; and

a video processor, coupled to at least the storage device, the video processor arranged for processing picture data derived from video data buffered in the storage device to generate output video pictures (sequence) to a display apparatus.

2. The video processing apparatus of claim 1, wherein the target video decoding mode is enabled when each color component in the encoded video bitstream has a first color depth different from a display color depth of the display apparatus.

3. The video processing apparatus of claim 2, wherein the first color depth is higher than the display color depth of the display apparatus.

4. The video processing apparatus of claim 2, wherein when the target video decoding mode is enabled, each color component in at least a portion of pictures of the decoded video pictures (sequence) has a second color depth equal to the display color depth of the display apparatus.

5. The video processing apparatus of claim 4, wherein when the target video decoding mode is enabled, at least one of an intra-prediction unit, a motion compensation unit and a de-blocking filter of the video decoder is configured to output each color component having the second color depth.

6. The video processing apparatus of claim 4, wherein the video processor directly retrieves the picture data with the second color depth from the storage device.

7. The video processing apparatus of claim 4, wherein when the target video decoding mode is enabled, the video decoder outputs the decoded video pictures (sequence) including reference pictures and non-reference pictures, where each color component in the reference pictures has the first color depth, and each color component in the non-reference pictures has the second color depth.

8. The video processing apparatus of claim 7, the video processor processes each of the reference picture to generate a processed reference picture, and performs color depth truncation upon the processed reference picture.

9. The video processing apparatus of claim 1, wherein the control unit reads a pre-defined system setting to set the color depth control signal.

10. The video processing apparatus of claim 1, wherein the control unit receives a user input to set the color depth control signal.

11. The video processing apparatus of claim 1, further comprising:

a detection unit, coupled to the control unit, the detecting unit arranged for generating a detection result by detecting configuration information of the display apparatus or by detecting system resource information of the video processing apparatus;

wherein the control unit sets the color depth control signal according to the detection result.

12. The video processing apparatus of claim 1, wherein color depth corresponding to the target video decoding mode is less than or equal to color depth of the encoded video bitstream.

13. A video processing apparatus, comprising:

a storage device;

a video decoder, coupled to the storage device, the video decoder arranged for decoding an encoded video bitstream and accordingly generating decoded video pictures (sequence) to the storage device; and

a video processor, coupled to the storage device, the video processor arranged for processing picture data derived from the data buffered in the storage device to generate output video pictures (sequence) to a display apparatus;

wherein each color component in the encoded video bitstream has a first color depth different from a color depth of the decoded video pictures (sequence).

14. The video processing apparatus of claim 13, wherein the first color depth is higher than the color depth of the decoded video pictures (sequence).

15. The video processing apparatus of claim 13, wherein each color component in the decoded video pictures (sequence) has a second color depth different from the first color depth;

and each color component in the picture data read from the decoded video pictures (sequence) in the storage device by the video processor has the second color depth.

16. The video processing apparatus of claim 13, wherein each color component in at least a portion of pictures in the decoded video pictures (sequence) has the second color depth.

17. The video processing apparatus of claim 16, wherein at least one of an intra-prediction unit, a motion compensation unit and a de-blocking filter of the video decoder is configured to output each color component having the second color depth.

18. The video processing apparatus of claim 17, wherein the video processor directly retrieves the picture data with the second color depth from the storage device.

19. The video processing apparatus of claim 16, wherein the video decoder generates the decoded video pictures (sequence) including reference pictures and non-reference pictures, where each color component in the reference pictures has the first color depth, and each color component in the non-reference pictures has the second color depth.

20. The video processing apparatus of claim 19, wherein the video processor processes each of the reference pictures to generate a processed reference picture, and performs color depth truncation upon the processed reference picture.