KR101428130B1 - Apparatus and method for parsing bitstream - Google Patents

Abstract

An apparatus and method for parsing a bitstream are disclosed. The apparatus comprising: an analysis unit for analyzing an input port representing a source of data in a despription; A data receiving unit for receiving data through the analyzed input port; And a parsing control unit for controlling the parsing process based on the data received through the input port.

Description

[0001] APPARATUS AND METHOD FOR PARSING BITSTREAM [0002]

The present invention relates to an apparatus and method for parsing a bitstream, and more particularly, to an apparatus and method for receiving a bitstream or feedback data of a functional unit in a decoder including at least one functional unit and parsing the bitstream.

Various kinds of functional units (FU) are used in MPEG RVC (MPEG Reconfigurable Video Coding) standard. Among them, Bitstream Syntax Parser FU (SynP FU) exists.

In the conventional standard framework, SynP FU was regarded as a relatively special functional unit. This is because the SynP FU is not an originally programmed functional unit but a Bitstream Syntax Description (BSD) received from the outside and defined as an FU generated based on the contents of the BSD.

Therefore, it is assumed that the input of the SynP FU is only a bit stream. However, in the case of a codec such as Graphic Codec, in which a parsing process and a decoding process are organically connected, there is a problem in that other input other than a bitstream must be received and reflected in a parsing process.

Therefore, a solution was needed to solve this problem using the existing SynP FU.

The present invention provides an apparatus and method for improving the format of Reconfigurable Video Coding-Bitstream Syntax Description Language (RVC-BSDL) so that BSD can provide an input of SynP FU.

The present invention provides an apparatus and method for performing a parsing process in response to a plurality of external inputs as well as a bitstream.

An apparatus in accordance with an embodiment of the present invention includes an input port analyzer for analyzing an input port representing a source of data in a despription; A data receiving unit for receiving data through the analyzed input port; And a parsing control unit for controlling the parsing process based on the data received through the input port.

A method according to an embodiment of the present invention includes analyzing an input port representing a source of data in a despription; Receiving data through the analyzed input port; And controlling the parsing process based on the data received through the input port.

A recording medium according to an embodiment of the present invention may record an input port indicating a source of data and a statement expressed by an attribute rvc: from from the input port.

An apparatus according to another embodiment of the present invention includes a data receiving unit for receiving a bitstream through an input port or receiving feedback data from at least one functional unit; And a parsing control unit for controlling the parsing process based on the data received through the input port.

A method according to another embodiment of the present invention includes receiving a bitstream through an input port; Receiving feedback data from at least one functional unit; And controlling a parsing process of the bitstream based on the feedback data received through the input port.

According to one embodiment of the present invention, the BSD may provide input to the SynP FU by improving the format of the RVC-BSDL.

According to an embodiment of the present invention, a parsing process can be performed corresponding to a plurality of external inputs as well as a bitstream.

1 is a block diagram illustrating an encoder and a decoder in accordance with an embodiment of the present invention.
2 is a block diagram illustrating a detailed configuration of a decoder according to an embodiment of the present invention.
3 is a block diagram showing a detailed configuration of a parsing apparatus according to an embodiment of the present invention.
4 is a diagram illustrating an example of controlling a parsing process according to an embodiment of the present invention.
5 is a flow chart illustrating a parsing method in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating an encoder and a decoder in accordance with an embodiment of the present invention.

At this time, Fig. 1 shows an encoder 101 and a decoder 102 constituting a Reconfigurable Video Coding (RVC) framework. According to the framework of FIG. 1, the encoder 101 may deliver a bitstream including the decoder description and the encoded video data to the decoder 102. [0033] FIG. At this time, the decoder statement defines the configuration of the decoder 102 composed of at least one functional unit. For example, the Decoder Descrption may comprise a Bitstream Syntax Description (BSD) and a decoder configuration representing the network configuration of the functional units.

The bitstream applied to the present invention can be embodied as a specific syntax, and the decoder can be composed of functional units that provide various coding tools.

The decoder 102 according to an embodiment of the present invention may be configured with a parsing apparatus for parsing a bitstream and at least one functional unit. In particular, a parsing apparatus according to an embodiment of the present invention may receive feedback data of each of a bitstream and functional units. To this end, according to an embodiment of the present invention, the parsing device may analyze a bitstream syntax statement that defines an input port that represents the source of the data. This will be described in detail below.

2 is a block diagram illustrating a detailed configuration of a decoder according to an embodiment of the present invention.

Referring to FIG. 2, the decoder 102 may include a parsing device 201 and at least one functional unit 202-1 through 202-3. 2, the parsing apparatus 201 may be referred to as a SynP FU, and the functional units 202-1 through 202-3 may be referred to as a Variable Length Decoder (VLD) FU.

According to one embodiment of the present invention, parsing device 201 may receive at least one bitstream. In addition, the parsing device 201 can receive feedback data from each of the at least one functional units 202-1 through 202-3.

At this time, the parsing apparatus 201 may analyze an input port indicating a source of data in a bitstream syntax statement (BSD) included in the bitstream. In particular, the parser 201 may analyze arbitrary input ports. To this end, the bitstream syntax statement may include an attribute indicating an input port. Then, the parsing apparatus 201 may analyze the attributes defined in the bitstream syntax statement, and receive data from the input port according to the analyzed result to control the parsing process.

The parsing apparatus 201 will be described in more detail with reference to FIG.

3 is a block diagram showing a detailed configuration of a parsing apparatus according to an embodiment of the present invention.

3, the parsing apparatus 201 may include an input port analyzing unit 301, a data receiving unit 302, and a parsing control unit 303. Referring to FIG.

The input port analyzing unit 301 may analyze an input port indicating a source of data in a despription. Here, the statement means a bitstream syntax statement included in the bitstream.

For example, the input port analyzing unit 301 can analyze a sentence represented by an RVC-BSDL such as an XML schema. The present invention is not limited to RVC-BSDL and can be extended to various languages that can express bitstream syntax statements.

At this time, the input port analyzing unit 301 can analyze the rvc: from attribute indicating the input port in the statement. rvc: from defines an input port that indicates the source of data to be received by the data receiving unit 302.

For example, a statement may contain the following sentence:

<xsd: element name = "chroma_format" rvc: from = "bitstream" type = "bs1: b2" />

Here, the statement means that the parser 201 recognizes the "chroma_format" bitstream syntax element from the "bitstream" input port in two 1-bit forms. Specifically, "chroma_format" means a bit stream component transmitted by the encoder 101. [

And the statement can include the following sentence:

<xsd: element name = "vertex_graph" rvc: from = "vertex_graph" type = "vertex_graph_type" />

Here, the statement means that the parsing apparatus 201 recognizes the "vertex_graph" feedback data from the "vertex_graph" input port in the form of "vertex_graph_type". Here, "vertex_graph" defined in the rvc: from attribute means a functional unit. That is, the statement indicates that the "vertex_graph" data is the feedback data input from the functional unit "vertex_graph". In particular, the statement may define the type, format, and number of data input through the input port.

Thus, according to an embodiment of the present invention, the rvc: from attribute may be defined in the statement to express the input port, which is the source of the data to be received by the parsing apparatus 201.

The data receiving unit 302 may receive data through the analyzed input port. At this time, the data receiving unit 302 may receive at least one bit stream as well as feedback data of at least one functional unit. That is, the number and type of data that the data receiving unit 302 can receive are not limited.

Specifically, the data receiving unit 302 can receive data through the input port defined in the rvc: from attribute included in the statement. In this way, the data receiving unit 302 can receive not only the bit stream from the encoder 101 but also the feedback data of the functional unit.

The parsing control unit 303 can control the parsing process based on the data received through the input port. Specifically, the parsing control unit 303 can control the parsing process of the bitstream of the multimedia data based on the feedback data of the functional unit received through the input port. In one example, the parsing control unit 303 may block the input of the bitstream of the multimedia data or wait for the parsing process based on the feedback data of the functional unit.

Some of the syntax parsing process may require that data be input from the outside. In this case, the parsing control unit 303 can suspend the operation of the corresponding parsing process until the data requested by the specific parsing process is sufficiently transmitted. To this end, a programming methodology such as a semaphore or a dataflow model can be applied.

For example, when the feedback data of the functional unit A is input, the parsing control unit 303 may block the input of the bit stream until the feedback data of the functional unit B is input or a specific algorithm is performed in the functional unit C. Alternatively, when the feedback data of the functional unit A is input, the parsing control unit 303 can suspend the input bit stream without proceeding with the parsing process.

4 is a diagram illustrating an example of controlling a parsing process according to an embodiment of the present invention.

The parsing apparatus (SynP FU) of FIG. 4 can receive feedback data from a plurality of functional units. For example, the parser may receive the feedback data LP from the functional unit "Vertex Graph ". The parser may then receive the feedback data TR from the functional unit " Triangle tree " and the feedback data CI from the functional unit "Triangle Data ".

To do this, the parser can analyze the input port defined in the rvc: from attribute in the statement and receive feedback data from the functional unit. The parsing device may receive the feedback data and control the parsing process.

For example, it is assumed that the parser can receive a feedback data LP from the functional unit "Vertex Graph " to proceed with a parsing process to generate a TT delivered to the functional unit" Triangle Tree ". Then, the parser can pause the parsing process associated with the functional unit "Triangle Tree " until it receives the feedback data LP from the functional unit" Vertex Graph ".

A specific method for controlling the parsing process may vary depending on the type of functional unit included in the decoder and the type of data to be decoded.

5 is a flow chart illustrating a parsing method in accordance with an embodiment of the present invention.

The parser may analyze the input port indicating the source of the data in the despription (S501).

For example, the parser may analyze a sentence represented by RVC-BSDL (Reconfigurable Video Coding-Bitstream Syntax Description Language). At this time, the parsing device may analyze the statement including the rvc: from attribute indicating the input port.

The parser may receive the data through the analyzed input port (S502). In one example, a parser may receive a bitstream of at least one multimedia data through an input port. The parser may also receive feedback data from at least one functional unit through the input port.

The parsing device can control the parsing process based on the data received through the input port (S503). For example, the parsing device can control the parsing process of the bitstream of the multimedia data based on the feedback data of the functional unit received via the input port. Specifically, the parsing device can block the input of the bitstream of the multimedia data or wait for the parsing process based on the feedback data of the functional unit.

The methods according to embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

101: Encoder
102: decoder

Claims (20)

An apparatus for receiving and parsing at least one bitstream,
An input port analyzer for analyzing an input port indicating a source of a bit stream in a despription;
A data receiving unit for receiving a bitstream of at least one multimedia data from the encoder through the analyzed input port and receiving feedback data from at least one functional unit; And
And a parsing control unit for controlling a parsing process of the bitstream based on feedback data of the functional unit received through the input port,
Lt; / RTI &gt;
The statement
And a type, a format, and a number of the bitstream or the feedback data received through the input port. delete delete The method according to claim 1,
Wherein the input port analyzing unit comprises:
(RVC-BSDL). &Lt; Desc / Clms Page number 12 &gt; 5. The method of claim 4,
Wherein the input port analyzing unit comprises:
Analyzing a statement of content indicating an input port. delete The method according to claim 1,
The parsing control unit,
And blocks input of a bit stream of the multimedia data or waits for a parsing process based on feedback data of the functional unit. A method performed by an apparatus for receiving and parsing at least one bitstream,
Analyzing an input port representing a source of the bitstream in a despription;
Receiving a bitstream of at least one multimedia data from an encoder over the analyzed input port and receiving feedback data from at least one functional unit; And
Controlling the parsing process for the bitstream based on feedback data of the functional unit received via the input port
Lt; / RTI &gt;
The statement
And a type, a format, and a number of the bitstream or the feedback data received through the input port. delete delete 9. The method of claim 8,
Wherein analyzing the input port comprises:
And analyzing a sentence represented by RVC-BSDL (Reconfigurable Video Coding-Bitstream Syntax Description Language). 12. The method of claim 11,
Wherein analyzing the input port comprises:
And analyzing a statement of content indicating an input port. delete 9. The method of claim 8,
Wherein the step of controlling the parsing comprises:
And blocks input of a bit stream of the multimedia data or waits for a parsing process based on feedback data of the functional unit. 14. A computer-readable medium having instructions for executing the method of any one of claims 8, 11, 12 and 14. An apparatus for receiving and parsing at least one bitstream,
A data receiving unit for receiving a bitstream through an input port and receiving feedback data from at least one functional unit; And
A parsing control unit for controlling a parsing process of the bitstream based on the feedback data received through the input port,
Lt; / RTI &gt;
The input port
Wherein the bitstream or the feedback data is analyzed based on a statement defining a type, a format, and a number of feedback data, and the source of the bitstream or the feedback data. delete Receiving and parsing at least one bitstream,
Receiving a bitstream through an input port;
Receiving feedback data from at least one functional unit; And
Controlling a parsing process of the bitstream based on feedback data received through the input port
Lt; / RTI &gt;
The input port
Wherein the bitstream or the feedback data is analyzed based on a statement defining a type, a format, and a number of the feedback data, and the source of the bitstream or the feedback data. delete 19. The method of claim 18,
Wherein the step of controlling the parsing comprises:
And controlling the parsing of the bit stream of the multimedia data based on the feedback data of the functional unit received through the input port.

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