KR101710290B1 - Decoder and decoding method - Google Patents

Abstract

The profile_tier_level syntax structure of the High Efficiency Video Coding (HEVC) syntax structure is updated to provide more flexibility for use in the vps_extension () syntax structure for use with each layer or operating point. A new flag 'LevelPresentFlag' is added to the profile_tier_level syntax structure to support variation of level parameters apart from profile / layer parameters. The update to the profile_tier_level syntax structure provides the flexibility to select profile_tier and level parameters for scalable video coding, multi-view coding and HEVC selection in 3D video coding areas.

Description

[0001] DECODER AND DECODING METHOD [0002]

Cross-reference to related application (s)

This application is a continuation-in-part of U.S. Provisional Application No. 61 / 748,878 entitled " JCTVC-L0XXX: VPS_EXTENSION WITH UPDATES OF PROFILE-TIER-LEVEL SYNTAX STRUCTURE ", filed January 4, 2013, The present application claims priority from US patent application Ser. No. 14 / 035,740 entitled " JCTVC-L0227: VPS_EXTENSION WITH UPDATES OF PROFILE-TIER-LEVEL SYNTAX STRUCTURE ". Each of the above-cited applications is incorporated herein by reference in its entirety for all purposes.

The present invention relates to the field of video coding. More particularly, the present invention relates to high efficiency video coding.

A Video Parameter Set (VPS) has been added as metadata to describe the full features of coded video sequences, including dependencies between temporal sublayers. The main purpose of this is, for example, that when the base layer of a future extended scalable or multi-view bitstream needs to be decodable by a legacy decoder, but additional information about the bitstream structure associated only with the advanced decoder is ignored To enable standards-compliant scalability in terms of signaling at the system layer.

The profile_tier_level syntax structure of the High Efficiency Video Coding (HEVC) syntax structure is updated to provide more flexibility for use in the vps_extension () syntax structure for use at each layer or operating point. A new flag 'LevelPresentFlag' is added to the profile_tier_level syntax structure to support the variation of Profile / Tier and Level parameters. The update to the profile_tier_level syntax structure provides the flexibility to select profile_tier and level parameters for scalable video coding, multi-view coding and HEVC selection in 3D video coding areas.

In an aspect, a method is programmed into a non-volatile memory of the device. The method includes acquiring a content, and generating a set of video parameters of the content using a level flag indicating a level within the content. The flag is an external transfer parameter. The flag is an added statement within the profile_tier_level syntax structure. Generating a video parameter set includes using a profile presence flag and if the profile presence flag is equal to 1, if profile information for the layer is present in the profile hierarchy level syntax structure and the profile presence flag is equal to 0, Profile information for that layer does not exist in the profile hierarchy level syntax structure. Generating a video parameter set includes using a profile reference layer number and if the profile presence flag is equal to zero then the profile information for that layer is the profile information of the layer indicated by the profile reference layer number Is assumed to be the same as the profile information. Generating a video parameter set includes using a level presence flag and if the level presence flag is equal to 1 then level information for the layer is present in the profile hierarchy level syntax structure and if the level presence flag is equal to 0, Level information for that layer does not exist in the profile hierarchy level syntax structure. Generating a video parameter set includes using a level reference layer number and the level reference layer number is equal to 0 and the level information for the layer is the same as the level information for the layer indicated by the level reference layer number . Generating a video parameter set includes using a profile presence flag, and if this flag is equal to 1, then profile information for the operating point is present in the profile hierarchy level syntax structure and if this flag is equal to 0, The profile information for the point does not exist in the profile hierarchy level syntax structure. Generating a video parameter set includes using a profile reference layer number and if the profile presence flag is equal to 0 then the profile information for the operating point is the same as the profile information for the operating point indicated by the profile reference layer number . Generating a video parameter set includes using a level presence flag, and if the level presence flag is equal to 1, then profile information for the operating point is present in the profile hierarchy level syntax structure, and if the level presence flag is equal to zero , Level information for the operating point does not exist in the profile hierarchy level syntax structure. Generating a video parameter set includes using a level reference layer number and the level reference layer number is equal to 0 and the level information for the operating point is the same as the level information of the operating point indicated by the level reference layer number . The device may be a personal computer, a laptop computer, a computer workstation, a server, a mainframe computer, a handheld computer, a personal digital assistant, a cellular / mobile phone, a smart home appliance, a game console, a digital camera, a digital camcorder, A portable music player, a tablet computer, a mobile device, a video player, a video disk recorder / player, a high definition disk recorder / player, an ultra high definition disk recorder / player, a television, a home entertainment system or a smart watch.

In another aspect, a method programmed in a non-volatile memory of a device includes the steps of acquiring content and generating a set of video parameters of the content using level flags indicative of levels within the content, Comprises using a profile presence flag, and if the profile presence flag is equal to 1, if profile information for the layer is present in the profile hierarchy level syntax structure and the profile presence flag is equal to 0, If the profile information for the layer is not present in the profile hierarchical level syntax structure and the profile existence flag is equal to 0, the profile information for the layer is assumed to be the same as the profile information of the corresponding layer indicated by the profile reference layer number, If the level presence flag is equal to 1, Is present in the profile hierarchy level syntax structure and the level presence flag is equal to 0, the level information for the layer is not present in the profile hierarchy level syntax structure and the level reference layer number is equal to 0, It is assumed that the information is the same as the level information of the layer indicated by the level reference layer number.

In another aspect, a device is for non-volatile memory for storing an application, the application for acquiring content and generating a set of video parameters of the content using a level flag indicating a level within the content, and a processing component coupled to the memory And the processing component is configured to process the application.

The flag is an external transfer parameter. The flag is an added statement within the profile_tier_level syntax structure. Generating a video parameter set includes using a profile presence flag and if the profile presence flag is equal to 1, if profile information for the layer is present in the profile hierarchy level syntax structure and the profile presence flag is equal to 0, Profile information for that layer does not exist in the profile hierarchy level syntax structure. Generating a video parameter set includes using a profile reference layer number and if the profile presence flag is equal to 0 then the profile information for that layer is the same as the profile information for that layer indicated by the profile reference layer number . Generating a video parameter set includes using a level presence flag and if the level presence flag is equal to 1 then level information for the layer is present in the profile hierarchy level syntax structure and if the level presence flag is equal to 0, Level information for the layer does not exist in the profile hierarchy level syntax structure. Generating a video parameter set includes using a level reference layer number and the level reference layer number is equal to 0 and the level information for the layer is the same as the level information for the layer indicated by the level reference layer number . Generating a video parameter set includes using a profile presence flag, and if this flag is equal to 1, then profile information for the operating point is present in the profile hierarchy level syntax structure and if this flag is equal to 0, The profile information for the point does not exist in the profile hierarchy level syntax structure. Generating a video parameter set includes using a profile reference layer number and if the profile presence flag is equal to 0 then the profile information for the operating point is the same as the profile information for the operating point indicated by the profile reference layer number . Generating a video parameter set includes using a level presence flag and if the level presence flag is equal to 1 then level information for the operating point is present in the profile hierarchy level syntax structure and if the level presence flag is equal to 0 , Level information for the operating point does not exist in the profile hierarchy level syntax structure. Generating a video parameter set includes using a level reference layer number and the level reference layer number is equal to 0 and the level information for the operating point is the same as the level information of the operating point indicated by the level reference layer number .

1 shows a flowchart of a method of using a modified VPS syntax according to some embodiments.
2 illustrates a block diagram of an exemplary computing device configured to implement a modified VPS method in accordance with some embodiments.
Figure 3 shows a general diagram for an HEVC encoder in accordance with some embodiments.
4 shows a general view of an HEVC decoder according to some embodiments.

Updates to the profile_tier_level syntax structure are described herein to support additional flexibility for HEVC extensions while being used in the vps_extensions () syntax structure for each layer or operating point.

The following is the profile_tier_level syntax structure presented in the current Draft International Standard (DIS) specification for high-efficiency video coding (HEVC).

The presence of profile_tier_level related syntax parameters is currently (limited) affected by the external parameter flag of profilePresentFlag used as the "passing" parameter in the profile_tier_level syntax structure in DIS. The following table shows which parameters can be affected when these syntax structures are used in the vps_extension () syntax structure to support various HEVC extensions requirements.

Currently selectable syntax parameters in profile_tier_level (DIS)

It is clear that one of the parameter-groups called "general_profile_tier " containing general syntax for" profile_tier_only "can not be a possible choice for use in the vps_extension () syntax structure. That is, all possible choices may not be possible with the existing profile_tier_level syntax construct. This is due to the lack of "conditionPresentFlag", which is another conditional flag, as an external delivery parameter similar to "profilePresentFlag" or as an added statement in the profile_tier_level syntax structure.

In the current HEVC specification, the profile and layer-related parameters may be changed for each layer or operating point based on setting the ProfilePresentFlag to 1 or 0. Level parameters are always adapted in general cases, and sub-layer related level parameters can be changed if sub_layer_level_present_flag is present.

From the profile / layer / level description, however, the level parameters may be common to some profile / layer cases and may be changed for other cases. In the general case, it is possible that the level parameters may be changed separately from the profile / layer parameter changes. That is, the level parameters can be changed by setting the new flag of LevelPresentFlag to 1 or 0.

The following table shows that all possible combinations of profile_tier and level parameters in the modified profile_tier_level syntax structure exist in vps_extension () when the "levelPresentFlag" exists as a transfer parameter similar to profilePresentFlag or as an added statement in the profile_tier_level syntax structure, And how it is possible.

Selectable syntax parameters in the updated profile_tier_level

1) profilePresentFlag enables restrictions (presence) of profile and hierarchy statements in the above syntax structure for both normal and sub-layer cases.

2) There is no such flag in the current_profile_tier_level syntax structure that affects (restricts) LevelIDC syntax parameters for both normal and sub-layer cases. Therefore, no restriction on the presence of LevelIDC can be imposed on the layer or operating point (OP) in vps_extension ().

3) The syntax of the profile_tier_level syntax can be updated as follows: Use "levelPresentFlag" as a transfer parameter similar to "profilePresentFlag", or insert levelPresentFlag as a new 1-bit syntax.

An updated profile_tier_level syntax structure with the levelPresent flag as a delivery parameter similar to profilePresentFlag is shown below.

The previously defined vps_extension () uses the vps_profile_tier syntax structure with a profilePresentFlag that is always set to 1 for all layers (i = 1 to vps_max_layers_minus1) as shown below. In general, there are no restrictions on profile_tier or level syntax parameters.

In the following sections, two schemes are implemented to limit these syntax parameters of profile_tier and / or levels while the modified profile_tier_level syntax structure is used in vps_extension () with layer-specific or operating point (OP) specific updates .

The layer-specific updates of profile_tier_level in vps_extension ()

In the syntax structure, four new syntax parameters are introduced:

vps_profile_present_flag [i]: When this flag is equal to 1, this specifies that the profile information for layer i exists in the profile_tier_level () syntax structure. When this flag is equal to 0, it specifies that the profile information for layer i is not in the profile_tier_level () syntax structure.

When the vps_profile_ref_layer_num [i]: vps_profile_present_flag [i] is equal to 0, the profile information for layer i is assumed to be the same as the profile information of the layer indicated by vps_profile_ref_layer_num [i] And is used as an index to a reference profile-tier level lookup table storing this information.

vps_level_present_flag [i]: When this flag is equal to 1, this specifies that level information for layer i exists in the profile_tier_level () syntax structure. When this flag is equal to 0, it specifies that the level information for layer i is not in the profile_tier_level () syntax structure.

When the vps_level_ref_layer_num [i]: vps_level_present_flag [i] is equal to 0, the level information for layer i is assumed to be the same as the layer level information indicated by vps_level_ref_layer_num [i] It is used as an index to the reference profile-layer-level lookup table that stores this information.

The combined effect of the values of vps_profile_present_flag and vps_level_present_flag is shown in the table below, where these syntax parameter flags are in the modified vps_extension () syntax structure shown above.

As an example, if both vps_profile_present_flag and vps_level_present_flag are 0 (see above table), the available syntax parameters are " It means that all parameters are available from stored or "reference" look-up tables. These reference parameters are already described in the two syntax parameters vps_profile_ref_layer_num and vps_level_ref_layer_num. The use of these "vps_profile_present_flag" and "vps_level_present_flag" helps to avoid unknown conditions.

OP-specific updates of profile_tier_level in vps_extension ()

In the syntax structure, four new syntax parameters are introduced, similar to the "level-specific update" case in the previous section.

vps_profile_present_flag [i]: When this flag is equal to 1, it specifies that the profile information for operating point i (or OP i) is in the profile_tier_level () syntax structure. When this flag is equal to 0, it specifies that the profile information for OP i does not exist in the profile_tier_level () syntax structure.

When the vps_profile_ref_op_num [i]: vps_profile_present_flag [i] is equal to 0, the profile information for OP i is assumed to be the same as the profile information of the OP indicated by vps_profile_refjayer_num [i] It is used as an index to the reference profile-layer-level lookup table that stores this information.

vps_level_present_flag [i]: When this flag is equal to 1, it specifies that the level information for OP i exists in the profile_tier_level () syntax structure. When this flag is equal to 0, it specifies that the level information for OP i is not in the profile_tier_level () syntax structure.

When the vps_level_ref_op_num [i]: vps_level_present_flag [i] is equal to 0, the level information for OPi is assumed to be the same as the level information of the OP indicated by vps_level_ref_layer_num [1] It is used as an index to the reference profile-layer-level lookup table that stores this information.

If this new flag of "LevelPresentFlag" is used in the "profile_tier_level" syntax structure, it is initialized in VPS and SPS as follows:

As described herein, the update to the profile_tier_level syntax structure is made to support additional flexibility in the selection of profile_tier and level parameters for HEVC extensions in scalable video coding, multi-view coding, and 3D video coding regions. Thereafter, this modified syntax structure is used in the vps_extension () syntax structure, where profile_tier and level syntax parameters are limited in two possible ways, either for each layer or for each operating point.

Figure 1 shows a flow diagram of a method of using a modified VPS syntax according to some embodiments. At step 100, a content (e.g., video) is obtained. The content can be obtained in any manner such as copied, downloaded, and captured using sensors or any other method. In step 102, the VPS data is generated using flags indicating levels. VPS data is also generated using additional flags and data to indicate levels and / or operating points. The VPS data includes various HEVC extension information in scalable video coding, multi-view coding, and 3D video coding areas. In some embodiments, the VPS data provides flexibility in profiles / layers / levels information. In some embodiments, additional or fewer steps are implemented. In some embodiments, the order of the steps is changed.

2 illustrates a block diagram of an exemplary computing device configured to implement a modified VPS method, in accordance with some embodiments. The computing device 200 may be used to acquire, store, calculate, process, communicate, and / or display information such as images and video. In general, a hardware architecture suitable for implementing the computing device 200 includes a network interface 202, a memory 204, a processor 206, an I / O device (s) 208, a bus 210, 212). The choice of processor is not critical, as long as a suitable processor with sufficient speed is selected. Memory 204 may be any conventional computer memory known in the art. The storage device 212 may include a hard drive, a CDROM, a CDRW, a DVD, a DVDRW, a Blu-ray (TM), a flash memory card, or any other storage device. The computing device 200 may include one or more network interfaces 202. An example of a network interface includes a network card connected to an Ethernet or other type of LAN. The I / O device (s) 208 may include one or more of a keyboard, a mouse, a monitor, a screen, a printer, a modem, a touch screen, a button interface and other devices. The modified VPS application (s) 230 used to perform the modified VPS method is stored in the storage device 212 and memory 204, and is likely to be processed as the application is typically processed. More or fewer components than those shown in FIG. 2 may be included in the computing device 200. In some embodiments, the modified VPS hardware 220 is included. Although the computing device 200 of FIG. 2 includes application 230 and hardware 220 for the modified VPS method, the modified VPS method may be implemented in a computing device in hardware, firmware, software, or any combination thereof. . For example, in some embodiments, the modified VPS application 230 is programmed into memory and executed using the processor. As another example, in some embodiments, the modified VPS hardware 220 is programmed hardware logic that includes gates specifically designed to implement the modified VPS method.

In some embodiments, the modified VPS application (s) 230 include multiple applications and / or modules. In some embodiments, the modules also include one or more sub-modules. In some embodiments, fewer or additional modules may be included.

Examples of suitable computing devices are personal computers, laptop computers, computer workstations, servers, mainframe computers, handheld computers, personal digital assistants, cellular / mobile telephones, smart appliances, game consoles, digital cameras, digital camcorders, (E.g., a DVD recorder / player, a high-definition disc recorder / player, a super-high-quality disc recorder / player), a television, a home entertainment device An entertainment system, a smart ornament (smart clock), or any other suitable computing device.

Figure 3 shows a general view of an HEVC encoder according to some embodiments. The encoder 300 may include a general coder control component, a transform scaling and quantization component, a scaling and inverse transform component, an intra-picture estimation component, a filter control analysis component, picture prediction component, deblocking and SAO filter component, motion compensation component, motion estimation component, and header formatting and CABAC components. The input video signal is received by the encoder 300 and divided into Coding Tree Units (CTU). The HEVC encoder components use the modified VPS to process the video data and generate a coded bit stream.

Figure 4 shows a general view of an HEVC decoder according to some embodiments. The decoder 400 includes an entropy decoding component, an inverse quantization component, an inverse transform component, a current frame component, an intra prediction component, a previous frame component, a motion compensation component, a deblocking filter, an SAO component and an adaptive loop filter. An input bitstream (e.g., coded video) is received by the decoder 400 and a decoded bitstream is generated for display. In some embodiments, the modified VPS is used during decoding.

To use the modified VPS method, devices can access parameters in scalable video coding, multi-view coding, 3D video coding, and VPS for mixed video sequences and their extensions. The modified VPS method is used automatically when performing video processing or at other times. The modified VPS method can be implemented automatically without user involvement.

In operation, the VPS and vps_extension () syntax structures are updated with some cleanup for HEVC extensions in scalable video coding, multi-view coding, and 3D video coding regions. The VPS is generated using the modified syntax structure.

U.S. Patent Application No. 14 / 035,680 filed September 24, 2013 entitled " VIDEO PARAMETER SET (VPS) SYNTAX RE-ORDERING FOR EASY ACCESS OF EXTENSION PARAMETERS "filed on September 24, 2013, U.S. Patent Application No. 14 / 035,711 (entitled " JCTVC-L0226: VPS AND VPS_EXTENSION UPDATES ") is incorporated herein by reference in its entirety.

Some embodiments of JCTVC-L0227: VPS_EXTENSION with update of profile-layer-level syntax structure

1. A method of programming into a non-volatile memory of a device,

a. Acquiring contents; And

b. Generating a video parameter set of the content using a level flag indicating a level within the content

≪ / RTI >

2. The method of claim 1, wherein the flag is an external transfer parameter.

The method of claim 1, wherein the flag is an added phrase in a profile_tier_level syntax structure.

4. The method of claim 1, wherein generating the video parameter set comprises using a profile presence flag, and if the profile presence flag is equal to one, then profile information for the layer is present in the profile hierarchy level syntax structure And if the profile presence flag is equal to zero, profile information for the layer is not present in the profile hierarchy level syntax structure.

5. The method of claim 4, wherein generating the video parameter set comprises using a profile reference layer number, and if the profile presence flag is equal to zero, Is assumed to be the same as the profile information of the layer indicated by the layer.

6. The method of claim 1, wherein generating the video parameter set comprises using a level presence flag, and if the level presence flag is equal to 1, then level information for the layer is present in the profile layer level syntax structure And if the level presence flag is equal to 0, level information for the layer is not present in the profile hierarchy level syntax structure.

7. The method of claim 1, wherein generating the video parameter set comprises using a level reference layer number, and wherein the level reference layer number is equal to 0, Is assumed to be the same as the level information of the layer indicated by the layer.

8. The method of claim 1, wherein generating the video parameter set comprises using a profile presence flag, and if the flag is equal to 1, profile information about the operating point is present in the profile hierarchy level syntax structure And if the flag is equal to zero, profile information for the operating point is not present in the profile hierarchy level syntax structure.

9. The method of claim 8, wherein generating the video parameter set comprises using a profile reference layer number, and if the profile presence flag is equal to 0, Wherein the profile information is assumed to be the same as the profile information of the operating point indicated by the number.

10. The method of claim 1, wherein generating the video parameter set comprises using a level presence flag, and if the level presence flag is equal to 1, And if the level presence flag is equal to zero, no level information for the operating point is present in the profile hierarchy level syntax structure.

11. The method of claim 1, wherein generating the video parameter set comprises using a level reference layer number, and wherein the level reference layer number is equal to zero, Wherein the level information is estimated to be the same as the level information of the operating point indicated by the number.

12. The device of claim 1, wherein the device is a personal computer, a laptop computer, a computer workstation, a server, a mainframe computer, a handheld computer, a personal digital assistant, a cellular / mobile phone, a smart home appliance, Video recorder / player, high-definition disc recorder / player, ultra-high-quality disc recorder / player, television, home entertainment system, or smart watch Methods of inclusion.

13. A method of programming into a non-volatile memory of a device,

a. Acquiring contents; And

b. Generating a video parameter set of the content using a level flag indicating a level within the content,

Wherein generating the video parameter set comprises using a profile presence flag, and if the profile presence flag is equal to one, then profile information for the layer is present in a profile hierarchy level syntax structure, 0, profile information for the layer is not present in the profile hierarchy level syntax structure, and if the profile presence flag is equal to 0, profile information for the layer is indicated by the profile reference layer number Level information is assumed to be the same as the profile information of the layer, and if the level presence flag is equal to 1, level information for the layer is present in the profile layer level syntax structure, and if the level presence flag is equal to 0, Level information is not present in the profile hierarchy level syntax structure, and Wherein the level reference layer number is equal to 0 and the level information for the layer is assumed to be the same as the level information of the layer indicated by the level reference layer number.

14. A device,

a. A non-volatile memory for storing an application,

I. Acquiring content;

Ii. To generate a video parameter set of the content using a level flag indicating a level within the content; And

b. A processing component coupled to the memory

And wherein the processing component is configured to process the application.

15. The apparatus of claim 14, wherein the flag is an external transfer parameter.

16. The apparatus of claim 14, wherein the flag is an added statement in a profile_tier_level syntax structure.

17. The method of claim 14, wherein generating the video parameter set comprises using a profile presence flag, and if the profile presence flag is equal to 1, profile information for the layer is present in the profile hierarchy level syntax structure, If the profile presence flag is equal to zero, profile information for the layer is not present in the profile hierarchy level syntax structure.

18. The method of claim 17, wherein generating the video parameter set comprises using a profile reference layer number, and if the profile presence flag is equal to zero, profile information for the layer is determined by the profile reference layer number Is assumed to be the same as the profile information of the layer being displayed.

19. The method of claim 14, wherein generating the video parameter set includes using a level presence flag, and if the level presence flag is equal to one, then level information for the layer is present in the profile layer level syntax structure, If the level presence flag is equal to zero, level information for the layer is not present in the profile hierarchy level syntax structure.

20. The method of claim 14, wherein generating the video parameter set comprises using a level reference layer number, and wherein the level reference layer number is equal to 0 and the level information for the layer is determined by the level reference layer number Is assumed to be the same as the level information of the layer being displayed.

21. The method of claim 14, wherein generating the video parameter set comprises using a profile presence flag, and if the flag is equal to 1, profile information about the operating point is present in the profile hierarchy level syntax structure, If the flag is equal to 0, profile information for the operating point is not present in the profile hierarchy level syntax structure.

22. The method of claim 21, wherein generating the video parameter set comprises using a profile reference layer number, and if the profile presence flag is equal to zero, profile information for the operating point is stored in the profile reference layer number Is assumed to be the same as the profile information of the operating point indicated by the operating point.

23. The method of claim 14, wherein generating the video parameter set comprises using a level presence flag, and if the level presence flag is equal to 1, then level information for the operating point is present in the profile hierarchy level syntax structure And if the level presence flag is equal to 0, then level information for the operating point is not present in the profile hierarchy level syntax structure.

24. The method of claim 14, wherein generating the video parameter set comprises using a level reference layer number, and wherein the level reference layer number is equal to 0, and wherein level information for the operating point is associated with the level reference layer number And is assumed to be the same as the level information of the operating point indicated by the operating point.

The invention has been described in terms of specific embodiments including details to facilitate an understanding of the principles of construction and operation of the invention. These references to specific embodiments and details of the present invention are not intended to limit the scope of the claims appended hereto. It will be apparent to those skilled in the art that various other modifications can be made in the embodiments chosen for illustration without departing from the spirit and scope of the invention as defined by the claims.

Claims (24)

The profile information of the operating point is parse from the bit stream whose syntax is that the profile information about the operating point is the same as the profile information of the operating point indicated by the profile reference layer number when the profile existence flag is 0, Pascal,
A decoding unit decoding the bitstream using profile information parsed by the parsing unit,
. The method according to claim 1,
Wherein the parser parses a bitstream whose syntax is that profile information about the operating point is not present in the profile hierarchy level syntax structure when the profile presence flag is zero. The method according to claim 1,
Wherein the parser parses a bitstream whose syntax is that profile information about the operating point is present in a profile hierarchical level syntax structure when the profile existence flag is one. The method of claim 3,
Wherein the decoding unit decodes the bit stream in units of a coding tree unit. 5. The method of claim 4,
A deblocking filter unit for applying a deblocking filter to the video data generated by the decoding unit,
And a decoder. 6. The method of claim 5,
An adaptive offset filter unit applying an adaptive offset (SAO) filter to the video data to which the deblocking filter is applied by the deblocking filter unit;
And a decoder. The profile information of the operating point is parse from the bit stream whose syntax is that the profile information about the operating point is the same as the profile information of the operating point indicated by the profile reference layer number when the profile existence flag is 0, And < / RTI >
A decoding step of decoding the bit stream using the profile information parsed in the parsing step
. 8. The method of claim 7,
Wherein the parsing step parses a bitstream whose syntax is that profile information about the operating point does not exist in the profile hierarchical level syntax structure when the profile existence flag is zero. 8. The method of claim 7,
Wherein the parsing step parses the bitstream in which the profile information about the operating point exists in the profile hierarchical level syntax structure when the profile existence flag is 1. 10. The method of claim 9,
And in the decoding step, the bit stream is decoded in units of a coding tree unit. 11. The method of claim 10,
A deblocking filter step of applying a deblocking filter to the video data generated in the decoding step
Further comprising the steps of: 12. The method of claim 11,
And an adaptive offset filter (SAO) filter for applying an adaptive offset (SAO) filter to the video data to which the deblocking filter is applied in the deblocking filter step
Further comprising the steps of: A computer-readable recording medium having recorded thereon a program for causing a computer to perform a decoding method,
The profile information of the operating point is parse from the bit stream whose syntax is that the profile information about the operating point is the same as the profile information of the operating point indicated by the profile reference layer number when the profile existence flag is 0, And < / RTI >
A decoding step of decoding the bit stream using the profile information parsed in the parsing step
Readable recording medium.
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