Moving image decoder and moving image decoding method

• US 8,982,966 B2
• Filed: 02/10/2012
• Issued: 03/17/2015
• Est. Priority Date: 07/28/2011
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Maruyama, Emi
• Primary Examiner(s): Vaughn, Jr., William C
• Assistant Examiner(s): Bennett, Michael
• Application Number:
  US13/371,225
• Publication Number:
  US 20130028318A1
• Time in Patent Office: 1,131 Days
• Field of Search: None
• US Class Current: 375/240.29
• 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 19/127 Prioritisation of hardware or computational resources
• CPC Class Codes: H04N 19/156 Availability of hardware or computational resources, e.g. encoding based on power-saving criteria
• CPC Class Codes: H04N 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/42 characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation H04N19/635 takes precedence
• 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 19/597 specially adapted for multi-view video sequence encoding

Abstract

In one embodiment, there is provided a moving image decoder for decoding a compression-coded moving image stream. The decoder includes: a deblocking filter configured to perform deblocking filter processing on each of frames to be decoded; a load detector configured to detect a magnitude of internal processing loads occurring inside a video player, including a processing load for decoding; a determination module configured to determine whether to bypass the deblocking filter processing, depending on the magnitude of the internal processing loads. The deblocking filter is configured to bypass the deblocking filter processing, if the magnitude of the internal processing loads is bigger than a threshold value and a processing subject block of the frame is decoded using inter-view prediction.

Claims

1. A moving image decoder for decoding a compression-coded moving image stream, the decoder comprising:

a deblocking filter to perform deblocking filter processing on each of the frames to be decoded;

a load detector to detect a magnitude of an internal processing load within a video player;

a determination module to determine whether or not to bypass the deblocking filter processing, depending on the magnitude of the internal processing load,

wherein the deblocking filter bypasses the deblocking filter processing when (1) the magnitude of the internal processing load is equal to or larger than a first threshold value and a first condition that two adjacent blocks in the frame are decoded using inter-view prediction is fulfilled, (2) the magnitude of the internal processing load is smaller than the first threshold and is equal to or larger than a second threshold value that is smaller than the first threshold and a second condition that the two adjacent blocks have a residual signal are fulfilled, and (3) the magnitude of the internal processing load is smaller than the second threshold and equal to or larger than a third threshold value that is smaller than the second threshold and a third condition that the two adjacent blocks have different reference pictures is fulfilled.

2. The decoder of claim 1, wherein a reference picture is a frame for motion compensation inter-frame prediction.

3. The decoder of claim 1, wherein a reference picture includes information for use in inter-frame prediction.

4. The decoder of claim 1, further comprising:

a monitor to display each of the decoded frames thereon.

5. A moving image decoding method of decoding a compression-coded moving image stream, the method comprising:

performing deblocking filter processing on each of the frames to be decoded;

detecting a magnitude of an internal processing load within a video player;

determining whether or not to bypass the deblocking filter processing, depending on the magnitude of the internal processing load; and

bypassing the deblocking filter processing when (1) the magnitude of the internal processing load is equal to or larger than a first threshold value and a first condition that two adjacent blocks are decoded using inter-view prediction (2) the magnitude of the internal processing load is smaller than the first threshold and equal to or larger than a second threshold value that is smaller than the first threshold and a second condition that the two adjacent blocks have a residual signal are fulfilled, and (3) the magnitude of the internal processing load is smaller than the second threshold and equal to or larger than a third threshold value that is smaller than the second threshold and a third condition that the two adjacent blocks have different reference pictures are fulfilled.

6. The method of claim 5, wherein a reference picture is a frame for motion compensation inter-frame prediction.

7. The method of claim 5, wherein a reference picture includes information for use in inter-frame prediction.

8. The method of claim 5, further comprising:

displaying each of the decoded frames on a monitor.