IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS

• US 20140093180A1
• Filed: 09/23/2013
• Published: 04/03/2014
• Est. Priority Date: 09/26/2012
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: ESENLIK, Semih, NARROSCHKE, Matthias, WEDI, Thomas
• Granted Patent: US 9,014,494 B2
• Time in Patent Office: Days
• US Class Current: 382/233
• CPC Class Codes: H04N 19/174 the region being a slice, e.g. a line of blocks or a group of blocks
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 19/423 characterised by memory arrangements H04N19/433 takes precedence
• CPC Class Codes: H04N 19/436 using parallelised computational arrangements
• 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 19/52 by predictive encoding
• CPC Class Codes: H04N 19/597 specially adapted for multi-view video sequence encoding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards

Abstract

A dependency indication is signaled within the beginning of a packet, that is, within the adjacent of a slice header to be parsed or a parameter set. This is achieved, for example, by including the dependency indication at the beginning of the slice header, preferably after a syntax element identifying the parameter set and before the slice address, by including the dependency indication before the slice address, by providing the dependency indication to a NALU header using a separate message, or by using a special NALU type for NALUs carrying dependent slices.

Claims

1. An image coding method of performing coding processing by partitioning a picture into a plurality of slices, the image coding method comprising

transmitting a bitstream which includes:

a dependent slice enabling flag indicating whether or not the picture includes a dependent slice on which the coding processing is performed depending on a result of the coding processing on a slice different from a current slice;

a slice address indicating a starting position of the current slice; and

a dependency indication indicating whether or not the current slice is the dependent slice,

wherein the dependent slice enabling flag is disposed in a parameter set common to the slices,

the slice address is disposed in a slice header of the current slice, and

the dependency indication is disposed in the slice header, and is disposed before the slice address and after a syntax element identifying the parameter set.

2. The image coding method according to claim 1,

wherein the dependency indication is included in the bitstream when the dependent slice enabling flag indicates inclusion of the dependent slice.

3. The image coding method according to claim 1,

wherein the dependent slice enabling flag is disposed at a beginning of the parameter set.

4. The image coding method according to claim 1,

wherein each of the slices includes a plurality of macroblocks, and

the coding processing on the current slice is started after the coding processing is performed on two of the macroblocks included in an immediately preceding current slice.

5. The image coding method according to claim 1,

wherein the dependency indication is not included in a slice header of a slice which is processed first for the picture, among the slices.

6. An image decoding method of performing decoding processing by partitioning a picture into a plurality of slices, the image decoding method comprising

extracting, from a coded bitstream, a dependent slice enabling flag indicating whether or not the picture includes a dependent slice on which the decoding processing is performed depending on a result of the decoding processing on a slice different from a current slice, a slice address indicating a starting position of the current slice, and a dependency indication indicating whether or not the current slice is the dependent slice,

wherein the dependent slice enabling flag is disposed in a parameter set common to the slices,

the slice address is disposed in a slice header of the current slice, and

the dependency indication is disposed in the slice header, and is disposed before the slice address and after a syntax element identifying the parameter set.

7. The image decoding method according to claim 6,

wherein the dependency indication is extracted from the bitstream when the dependent slice enabling flag indicates inclusion of the dependent slice.

8. The image decoding method according to claim 6,

wherein the dependent slice enabling flag is disposed at a beginning of the parameter set.

9. The image decoding method according to claim 6,

wherein each of the slices includes a plurality of macroblocks, and

the decoding processing on the current slice is started after the decoding processing is performed on two of the macroblocks included in an immediately preceding current slice.

10. The image decoding method according to claim 6,

wherein the dependency indication is not included in a slice header of a slice which is processed first for the picture, among the slices.

11. An image coding apparatus which performs coding processing by partitioning a picture into a plurality of slices, the image coding apparatus comprising

a coder which transmits a bitstream which includes:

a dependent slice enabling flag indicating whether or not the picture includes a dependent slice on which the coding processing is performed depending on a result of the coding processing on a slice different from a current slice;

a slice address indicating a starting position of the current slice; and

a dependency indication indicating whether or not the current slice is the dependent slice,

wherein the dependent slice enabling flag is disposed in a parameter set common to the slices,

the slice address is disposed in a slice header of the current slice, and

the dependency indication is disposed in the slice header, and is disposed before the slice address and after a syntax element identifying the parameter set.

13. An image coding and decoding apparatus comprising:

the image coding apparatus according to claim 11; and

an image decoding apparatus which performs decoding processing by partitioning a picture into a plurality of slices,

wherein the image decoding apparatus includes

a decoder which extracts, from a coded bitstream, a dependent slice enabling flag indicating whether or not the picture includes a dependent slice on which the decoding processing is performed depending on a result of the decoding processing on a slice different from a current slice, a slice address indicating a starting position of the current slice, and a dependency indication indicating whether or not the current slice is the dependent slice,

wherein the dependent slice enabling flag is disposed in a parameter set common to the slices,

the slice address is disposed in a slice header of the current slice, and

the dependency indication is disposed in the slice header, and is disposed before the slice address and after a syntax element identifying the parameter set.

12. An image decoding apparatus which performs decoding processing by partitioning a picture into a plurality of slices, the image decoding apparatus comprising

a decoder which extracts, from a coded bitstream, a dependent slice enabling flag indicating whether or not the picture includes a dependent slice on which the decoding processing is performed depending on a result of the decoding processing on a slice different from a current slice, a slice address indicating a starting position of the current slice, and a dependency indication indicating whether or not the current slice is the dependent slice,

wherein the dependent slice enabling flag is disposed in a parameter set common to the slices,

the slice address is disposed in a slice header of the current slice, and

the dependency indication is disposed in the slice header, and is disposed before the slice address and after a syntax element identifying the parameter set.