Decoding apparatus using tool information for constructing a decoding algorithm

• US 20070081732A1
• Filed: 12/08/2006
• Published: 04/12/2007
• Est. Priority Date: 10/12/1995
• Status: Active Grant

• Current Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Original Assignee: Noritaka Koizumi, Seiji Sato, Tadashi Uchiumi, Takeshi Makiyama
• Inventors: Sato, Seiji, Uchiumi, Tadashi, Koizumi, Noritaka, Makiyama, Takeshi
• Granted Patent: US 7,340,102 B2
• Time in Patent Office: Days
• US Class Current: 382/239
• CPC Class Codes: H04N 19/00 Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
• CPC Class Codes: H04N 19/12 Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
• CPC Class Codes: H04N 19/156 Availability of hardware or computational resources, e.g. encoding based on power-saving criteria
• CPC Class Codes: H04N 19/164 Feedback from the receiver or from the transmission channel
• 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 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/51 Motion estimation or motion compensation
• CPC Class Codes: H04N 19/523 with sub-pixel accuracy
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 19/82 involving filtering within a prediction loop
• CPC Class Codes: H04N 21/25858 involving client software characteristics, e.g. OS identifier
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/8193 dedicated tools, e.g. video decoder software or IPMP tool

Abstract

A coding and decoding apparatus is constructed so that the coding side transmits coded data together with identifying information for identifying the device of decoding the coded data, and the decoding side is capable of storing a number of decoding schemes so as to perform decoding based on one of the previously stored schemes. The apparatus further has devices for storing the received tools and tool-correspondent information which numerically represents the capacities of the tools so that it can make a comparison between the decoding capacity and the processing capacities of the tools to determine the possibility of the operations of the received tools. Further, a set of the tools are hierarchized so that the coded data produced by the n-ranked tool can be decoded by the (n+1)-ranked tool. Alternatively, the tools are defined in a hierarchical manner so that the decoding tools installed in the decoding apparatus will be able to assure the minimum quality and the requested decoding process can be performed by the received decoding tool. Further, the identification code ofthe decoding scheme used can be transmitted as required so that the decoding scheme can be expanded by transmitting the differential information from the basic decoding scheme.

Claims

1. An image data coding apparatus comprising:

a motion compensator comprising at least two different motion compensating tools;

a transformer;

a quantizer comprising at least two different quantizing tools;

an inverse quantizer comprising at least two different inverse quantizing tools; and

an inverse transformer;

said image data coding apparatus transmitting

(a) information indicating a motion compensating tool for performing motion compensation and

(b) information indicating an inverse quantizing tool for inverse quantizing the coded image data.

2. The image data coding apparatus of claim 1 wherein said motion compensator includes

(a) a first tool for sampling per half pixel and per integer pixel and

(b) a second tool for sampling per quarter pixel, per half pixel and per integer pixel.

3. The image data coding apparatus of claim 1 wherein said inverse quantizer includes

(a) a first tool having a first processing capability and

(b) a second tool having a second processing capability different than the first processing capability.

4. An image data decoding apparatus comprising:

a motion compensator comprising at least two different motion compensating tools;

an inverse quantizer comprising at least two different inverse quantizing tools; and

an inverse transformer;

said image data decoding apparatus receiving

(a) information indicating a motion compensating tool for performing motion compensation and

(b) information indicating an inverse quantizing tool for inverse quantizing the coded image data.

5. The image data decoding apparatus of claim 4 wherein said motion compensator includes

(a) a first tool for sampling per half pixel and per integer pixel and

(b) a second tool for sampling per quarter pixel, per half pixel and per integer pixel.

6. The image data decoding apparatus of claim 4 wherein said inverse quantizer includes

(a) a first tool having a first processing capability and

(b) a second tool having a second processing capability different than the first processing capability.