WO2009125993A2 - 적응적 복호화 장치 및 방법 - Google Patents
적응적 복호화 장치 및 방법 Download PDFInfo
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- WO2009125993A2 WO2009125993A2 PCT/KR2009/001847 KR2009001847W WO2009125993A2 WO 2009125993 A2 WO2009125993 A2 WO 2009125993A2 KR 2009001847 W KR2009001847 W KR 2009001847W WO 2009125993 A2 WO2009125993 A2 WO 2009125993A2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4348—Demultiplexing of additional data and video streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
Definitions
- the present invention relates to a decoding apparatus, and more particularly, to an adaptive decoding apparatus and method for adaptively configuring a decoding process based on a coding format of a bitstream.
- a video is converted into a bitstream form by an encoder.
- the bitstream is stored according to an encoding type satisfying the constraint of the encoder.
- MPEG requires syntax (syntax) and semantics (hereinafter referred to as “semantics”) as constraints on the bitstream.
- the syntax indicates the structure, format, and length of the data, and in what order the data is represented.
- the syntax is to fit a grammar for encoding / decoding, and defines the order, length, format, etc. of data included in the bitstream.
- Semantics means what each bit of data means. That is, semantics indicates what the meaning of each element in the bitstream is.
- bitstreams may be generated according to encoding conditions of an encoder or an applied standard (or codec).
- each standard e.g. MPEG-1, MPEG-2, MPEG-4, MPEG-4 AVC, etc.
- MPEG-1, MPEG-2, MPEG-4, MPEG-4 AVC, etc. has a different bitstream syntax and decoding process, respectively.
- bitstream encoded according to each standard or encoding condition has a syntax, semantics, and decoding process of different formats, and a decoder corresponding to an encoder must be used to decode the bitstream.
- the conventional bitstream decoder has a limitation of satisfying the constraints of the encoder, and this limitation causes a difficulty in implementing an integrated decoder corresponding to a plurality of standards.
- the present invention is to solve the above-described problem, it is adaptive to adapt the bitstream encoded in various formats according to each standard (for example, MPEG-1, MPEG-2, MPEG-4, MPEG-4 AVC, etc.)
- the present invention provides an adaptive decoding apparatus and method for adaptively configuring a decoding process based on a coding format of input data in order to decode.
- the present invention adaptively configures a decoding process based on an encoding format of input data by organically connecting a partial decoding process of a predetermined unit necessary to decode a bitstream encoded in various forms to form a decoding process. It is to provide a decoding apparatus and method.
- the present invention provides an apparatus and method for adaptive decoding capable of adaptively parsing and decoding bitstreams having various types of syntax.
- an adaptive decoding apparatus for adaptively configuring a decoding process based on an encoding format of input data is provided.
- an adaptive decoding apparatus for adaptively configuring a decoding process based on an encoding format of input data, and outputs by separating decoding module configuration information and encoded data from input data received from the outside. Separation unit; A decoding module storage unit for storing a plurality of decoding modules for performing a partial decoding process of a predetermined unit; A decoding module configuration information analyzing unit configured to analyze the encoded data according to the decoding module configuration information to generate and output syntax parsing control information and connection control information; And loading and connecting target decoding modules from the decoding module storage unit using the connection control information to form a recombination decoder, and decoding the encoded data according to the syntax parsing control information using the recombination decoder.
- An adaptive decoding apparatus including a unit may be provided.
- an adaptive decoding apparatus for adaptively configuring a decoding process based on an encoding format of input data, comprising: separating and outputting decoding module configuration information and encoded data from received input data part; A decoding module storage unit for storing a plurality of decoding modules for performing a partial decoding process of a predetermined unit; A decoding module configuration information analyzing unit configured to analyze the encoded data according to the decoding module configuration information to generate and output syntax parsing control information and connection control information; A decoding model generator for generating a decoding model indicating a connection relationship between the target decoding modules required for the decoding process of the encoded data and the target decoding modules using the connection control information; And loading and connecting the target decoding modules from the decoding module storage unit using the decoding model to form a recombinant decoder, and syntax parsing and decoding the encoded data according to the syntax parsing control information through the recombinant decoder.
- An adaptive decoding apparatus including a decoding execution
- an adaptive decoding method for adaptively configuring a decoding process based on an encoding format of input data is provided.
- an adaptive decoding method in which the adaptive encoding apparatus adaptively configures a decoding process based on an encoding format of input data, decoding module configuration information and encoded data from received input data. Separating the; Generating syntax parsing control information and connection control information for the encoded data using the decoding module configuration information; Forming a recombination decoder by loading and connecting one or more decoding modules according to the connection information among a plurality of preset decoding modules; And syntax parsing and decoding the encoded data using the syntax parsing control information through the recombination decoder.
- an adaptive decoding method in which the adaptive encoding apparatus adaptively configures a decoding process based on an encoding format of input data, decoding module configuration information and encoded data from received input data. Separating the; Generating syntax parsing control information and connection control information for the encoded data using the decoding module configuration information; Generating a decoding model for decoding the encoded data using the connection control information and a decoding model indicating an interconnection relationship between the decoding modules; Forming a recombination decoder by loading and connecting one or more decoding modules from among a plurality of predetermined decoding modules using the decoding model; And syntax parsing and decoding the encoded data using the syntax parsing control information through the recombination decoder.
- the present invention has the effect of decoding the input data by adaptively configuring a decoding process based on the encoding format of the input data.
- the present invention also provides an integrated decoding apparatus capable of adaptively decoding a bitstream encoded according to various standards (eg, MPEG-1, MPEG-2, MPEG-4, MPEG-4 AVC, etc.). There is an effect that can be implemented.
- various standards eg, MPEG-1, MPEG-2, MPEG-4, MPEG-4 AVC, etc.
- the present invention configures a decoding process by organically connecting a partial decoding process of a predetermined unit necessary to decode a bitstream encoded in various forms, thereby adaptively configuring a decoding process based on an encoding format of input data. It works.
- the present invention has the effect of adaptively parsing and decoding bitstreams having various types of syntax.
- the present invention it is possible to implement unit functions constituting various decoding methods proposed by various standards (codecs) as a decoding module, and to adaptively reconfigure and execute the decoding module according to an encoding format of an input image. .
- 1 is a diagram schematically showing a configuration of a general decoder.
- FIG. 2 is a diagram schematically illustrating a general encoder configuration.
- FIG. 3 is a block diagram of a decoding apparatus according to an embodiment of the present invention.
- FIG. 4 is a diagram illustrating an embodiment of a decoding unit of FIG. 3.
- FIG. 5 is a block diagram of a parsing module according to an embodiment of the present invention.
- FIG. 6 illustrates a decoding module connected to implement 1-D IDCT according to an embodiment of the present invention.
- FIG. 7 illustrates a decoding module connected to implement 2-D IDCT according to an embodiment of the present invention.
- FIG. 8 is a block diagram of a decoding model generator according to another embodiment of the present invention.
- decoding module storage unit 440 decoding model generation unit
- decryption execution unit 460 storage unit
- first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
- FIG. 1 is a diagram schematically illustrating a configuration of a general decoder, which is a configuration diagram of a general MPEG-4 decoder.
- the MPEG-4 decoder 100 generally includes a variable length decoding unit 110, an inverse scan unit 115, and an inverse DC / AC prediction unit. / AC Prediction (120), Inverse Quantization (125), Inverse Discrete Cosine Transform (Inverse Discrete Cosine Transformation, 130), and Video Restoration (VOP Reconstruction, 135). It is apparent that the configuration of the decoder 100 may be different according to the applied standard, and some components may be replaced with other components.
- variable-length decoding unit 110 quantizes the Huffman Table using a preset Huffman Table.
- the inverse scan unit 115 performs the inverse scan to generate data in the same order as the moving image 140. That is, the inverse scan unit 115 outputs a value in reverse of the order of scanning in various ways during encoding.
- a scan direction may be defined according to a distribution of frequency band values. In general, a zig-zag scan method is used, but the scan method may vary by codec.
- Syntax parsing may be performed integrally in the variable length decoding unit 110 or in any component that processes the bitstream 105 prior to the variable length decoding unit 110.
- the syntax parsing is uniformly processed by a predetermined criterion corresponding to the standard since the standard applied to the encoder and the decoding period is the same.
- the inverse DC / AC predictor 120 determines the direction of the reference block for prediction by using the magnitude of the DCT coefficient in the frequency band.
- the inverse quantizer 125 inverse quantizes the inversely scanned data. That is, the DC and AC coefficients are reduced by using a quantization parameter (QP) specified during encoding.
- QP quantization parameter
- the inverse DCT unit 130 performs an Inverse Discrete Cosine Transform to obtain an actual video pixel value to generate a VOP (Video Object Plane).
- VOP Video Object Plane
- the video restoring unit 135 restores and outputs a video signal using the VOP generated by the inverse DCT unit 130.
- FIG. 2 is a diagram schematically illustrating a general encoder configuration and is a block diagram of a general MPEG-4 encoder.
- the MPEG-4 encoder 200 generally includes a DCT unit 210, a quantizer 215, a DC / AC predictor 220, a scan unit 230, and a variable length encoder ( 235).
- Each component included in the encoder 200 performs the inverse function of each component of the corresponding decoder 100, which is obvious to those skilled in the art.
- the encoder 200 performs encoding by converting a video signal (ie, a digital image pixel value) into a frequency value through a discrete cosine transform, quantization, and the like, and then encoding the information.
- Variable length encoding for differentiating bit lengths according to the frequency numbers is performed and output in the compressed bitstream 105 state.
- the adaptive decoding apparatus has a configuration different from that of the conventional general decoder as described above.
- the adaptive decoding apparatus includes a plurality of decoding modules capable of forming a decoder by being adaptively combined according to a coding format to decode bitstreams according to various coding formats.
- the decoder in which the decoding modules are adaptively combined according to the encoding format of the input bitstream will be referred to as a reconfigured decoder.
- the decoding module is a functional module that performs a partial process of the decoding process, that is, a partial decoding process of a predetermined unit.
- the variable length decoding unit 110, the inverse scan unit 115, the inverse DC / AC prediction unit 120, and the inverse quantization unit Inverse of FIG. Quantization (125), Inverse Discrete Cosine Transform (Inverse Discrete Cosine Transformation, 130), and Video Restoration (VOP Reconstruction, 135) may be implemented as a decoding module, and the process of the component Detailed units of processes may be implemented as a decoding module.
- the adaptive decoding apparatus may adaptively configure the recombination decoder by combining necessary decoding modules according to the encoding format of the input bitstream using the decoding module information. For this reason, the decoding apparatus according to the present invention may decode the bitstream by forming a recombination decoder corresponding to the encoding format of the input bitstream even if a bitstream encoded in any format is input.
- the adaptive decoding apparatus receives decoding module configuration information along with the bitstream.
- the decoding module configuration information may be provided to the decoding apparatus in the form of a bitstream integrated with the bitstream, or may be provided in an independent data form.
- the provision of the decoding module configuration information may be omitted.
- the adaptive decoding apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
- the components of the adaptive decoding apparatus described later may be implemented as a software program (or a combination of program codes) implemented to perform a corresponding function.
- FIG. 3 is a block diagram of an adaptive decoding apparatus according to an embodiment of the present invention.
- the adaptive decoding apparatus 300 may include a separator 310 and a decoder 320.
- the separating unit 310 separates the input bitstream into compressed decoding module configuration information compressed and encoded data, and inputs them to the decoding unit 320.
- the separation unit 310 may be omitted.
- the encoded data may be data having the same or similar format as the bitstream of FIG. 1.
- the decoder 320 configures a decoder by combining necessary decoding modules using the decoding module configuration information input from the separator 310, and decodes the encoded data to output decoded video data.
- the decoding module configuration information is information that forms a decoder by combining decoding modules and describes information for decoding input data based on XML (Extensible Markup Language), and includes syntax parsing control information, connection control information, and context control information. It is configured to include.
- XML Extensible Markup Language
- the syntax parsing control information is information describing syntax of encoded data, and includes information describing an order, a length, and an output port of each of the data constituting the encoded bitstream.
- the syntax parsing control information is used for syntax parsing of encoded data.
- connection control information is information describing decoding modules required for decoding the coded data.
- the connection control information includes information about a decoding module required for configuring a decoder and information describing a connection relationship between decoding modules.
- the context control information is variable and constant information referenced by the decoding module.
- connection control information may express a connection relationship between decoding modules by designating a port number in detailed information of an element for storing connection control information (for convenience, referred to as a "connection information element").
- connection information element for convenience, referred to as a "connection information element"
- a sub element of the corresponding connection information element may be generated, and the sub element may store information about an additional connection relationship such as the size of data to be transmitted as well as the connection relationship between two modules.
- FIG. 4 is a diagram illustrating an embodiment of a decoding unit of FIG. 3.
- the decoder 320 includes a decompressor 410, a decoder module configuration information analyzer 420, a decoder module storage 430, a decryption model generator 440, and a decoder execution unit ( 450 and a storage unit 460.
- the decompressor 410 decompresses the compressed decoding module configuration information input from the separator 310 and outputs XML-based decoding module configuration information to the decoding module configuration information interpreter 420.
- the decoding module configuration information is compressed and transmitted as a binary code for high transmission efficiency, and the decompression unit 410 restores the received data compressed with the binary code into XML-based data. It is obvious that various binary code conversion methods can be applied to the process of compressing and restoring XLM-based data into binary code. Of course, when the decoding module configuration information is received without being compressed, the restoration unit 410 may be omitted.
- the decoding module configuration information analysis unit 420 analyzes the received XML-based decoding module configuration information and detects and outputs context control information, connection control information, and syntax parsing control information. At this time, the decoding module configuration information analyzing unit 420 interprets the decoding module configuration information described in XML format according to the bitstream structure description method defined in the BSDL schema standard (ISO / IEC 23001-5 BSDL). can do. For example, if there is unit information of "bs2: if", whether the bitstream indicated by the corresponding syntax is recognized may be indicated through a conditional expression included in the unit information.
- the decoding module storage unit 430 stores a plurality of decoding modules that perform a predetermined unit decoding process.
- the plurality of decoding modules include a parsing module that performs syntax parsing and a processing module for decoding the syntax parsed data.
- the parsing module parses the input bitstream based on the syntax parsing control information.
- the parsing module according to the present invention is not limited to a specific bitstream by using syntax parsing control information, and may perform syntax parsing on various bitstreams.
- An example of the processing module may be an I DCT decoding module that performs a function of reconstructing a video by performing an inverse DCT operation.
- the decoding module storage unit 430 outputs a corresponding decoding module in response to a request of the decoding execution unit 450.
- the decoding module storage unit 430 may add a new decoding module or delete an existing decoding module according to a user input.
- the decoding model generator 440 generates and outputs a decoding model that defines decoding modules required for a decoding process and connection relationships between the decoding modules, using the connection control information.
- the decoding model is a structure in which decoding modules necessary for decoding input data are organically connected to a rear end of a parsing module, and may be implemented as a block diagram GUI and displayed to a user.
- the decoding model generator 440 outputs the decoding model and / or connection control information to the decoding execution unit 45.
- the decoding execution unit 450 constructs a recombination decoder by loading and connecting the decoding modules required for the decoding process using the decoding model or the connection control information from the decoding module storage unit 430, and performs the syntax parsing control information and the context control.
- the input data is syntax parsed and decoded through the decoding modules constituting the recombination decoder using the information.
- the process of the decoding execution unit 450 will be described in more detail as follows.
- the decoding execution unit 450 receives the encoded data from the separation unit 310. Subsequently, the decoding execution unit 450 loads and connects a parsing module and processing modules required for decoding by using the decoding model or connection control information to form a recombination decoder.
- the recombinant decoder has a structure in which a plurality of processing modules are organically connected to a rear end of a parsing module.
- the decoding execution unit 450 parses the encoded data input through the parsing module using the syntax parsing control information, and outputs the syntax parsed data to a processing module connected to the rear end of the parsing module, thereby receiving the input data. Perform the decoding process. At this time, the decoding execution unit 250 may modify a part of the context control information by using the parsed information.
- the storage unit 460 temporarily stores necessary information during the decoding process.
- the storage unit 460 may receive and store syntax-parsed data and syntax additional information (eg, element length information and output port information) from the parsing module.
- the storage unit 460 may output the stored information to the decoding execution unit 450 at the request of the decoding module.
- the decoding module configuration information does not necessarily include information corresponding to all decoding module configuration information, and may include a codec number (code #), a profile and a level number (profile and level).
- code # codec number
- profile and level level number
- the restoration unit 410 may output previously stored decoding module configuration information to the decoding module configuration information analyzer 420.
- the restoration unit 410 receives the codec number, the profile and the level number, and the configuration information about some decoding modules, the decompression module configuration information is modified according to the configuration information for some decoding modules. The output may be output to the analyzer 420.
- the decoding module configuration information written in the XML represents a part related to syntax parsing among all the decoding module configuration information.
- the decoding module configuration information analyzing unit 420 interprets the input information in units of facets according to the XML parsing principle.
- the syntax parsing control information extracted from the input information according to the XML parsing principle is shown in Table 1 below.
- the parsing module receives syntax parsing control information from the decoding execution unit 450 and performs syntax parsing.
- the parsing module may refer to detailed information of each element by using an element name as an index.
- the details define the syntax parsing process as follows:
- Type details indicates the bit length of the element and the type of information (integer, float, etc.).
- the type of the VOP element is "VideoObjectPlaneType", which defines the element bit length and information format for each type in the BSDL standard.
- the decoding execution unit 450 may use the information of the corresponding element only when the information of the bitstream falls within the range described in ifNext.
- the decoding execution unit 450 controls the parsing module to output the syntax-parsed data to the processing module connected to the output port of the parsing module.
- the present invention may use detailed information other than the above detailed information, the definition of which conforms to the BSDL schema standard (ISO / IEC 23001-5 BSDL).
- FIG. 5 is a configuration diagram of a parsing module according to an embodiment of the present invention.
- the parsing module includes an information analyzer 510, a parser 520, a port allocator 530, and a plurality of output ports (first port, second port,..., Third port). It includes an output unit 540 composed of.
- the information analyzer 510 analyzes the syntax parsing control information received from the decoding execution unit 450 and extracts the length and output port number of the data constituting the bitstream to be parsed.
- the decoding module configuration information written in the XML represents a part related to syntax parsing among all the decoding module configuration information.
- Table 2 illustrates syntax parsing control information extracted by the decoding module configuration information analyzing unit 420 according to the XML parsing principle.
- the bit length of each element is shown in the Type details of Table 2.
- the information analyzer 510 analyzes the extracted syntax parsing control information and calculates data length and output port information. At this time, the information analysis unit 510 may calculate the length of the data by analyzing the type detail information according to the format determined by the BSDL schema standard (ISO / IEC 23001-5 BSDL). For example, the information analyzer 510 determines that the length of the data 1 is 3 bits through the type detail information 'b3'. Subsequently, the information analyzing unit 510 checks the rvc: Port detailed information to determine that the output port of the data 1 is the first port. The information analyzer 510 may extract the length and the output port number of the data 2 and the data 3 in the same manner as the data 1.
- the information analyzer 510 may analyze the type detail information by using the syntax-parsed data previously. For example, the information analyzer 510 may analyze syntax parsing control information using previously parsed data and calculate a length of current data. At this time, the information analysis unit 510 may request and parse the previously parsed data to the storage unit 460.
- the information analyzer 510 outputs the name, the length, and the output port number of the corresponding data to the parser 520.
- the parser 520 parses the input bitstream using the length of the data received from the information analyzer 720 and the output port number. For example, the parser 520 determines that the length of the data 1 is '3' and extracts 3 bits from the bitstream. The parser 520 outputs the extracted 3-bit data and the output port number to the port allocator 530.
- the port allocator 530 allocates the input data to the corresponding output port according to the output port number received from the parser 520.
- the output unit 540 outputs data allocated to the corresponding output port to the input port of the decoding module connected according to the connection control information. For example, the port allocator 530 assigns data 1 to the first port. Subsequently, the output unit 540 outputs data 1 to an input port of a decoding module connected to the corresponding output port.
- the parsing module then parses data 2 and data 3 in the same manner as the syntax parsing process of data 1.
- the parsing module may parse various syntaxes without changing the structure by using the syntax parsing control information. Therefore, when the decoding apparatus according to the present embodiment is implemented as an actual hardware chip, it is possible to ensure real time decoding of a bitstream encoded in various formats with one hardware chip.
- connection control information and context control information described in an XML format will be described according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating a decoding module connected to implement 1-D IDCT according to an embodiment of the present invention
- FIG. 7 is a diagram of a decoding module connected to implement 2-D IDCT according to an embodiment of the present invention. Illustrated drawing.
- connection control information included in the decoding module configuration information described in XML according to an embodiment of the present invention is described using an element as illustrated in Table 3 below.
- connection control information includes a network, identification information (Package or QID) indicating a location in a hierarchical structure, and port information of a decoding module. (Port) and input / output port connection information (Connection) between the decoding modules connected to each other.
- Table 4 is a table illustrating the context control information included in the decoding module configuration information described in XML according to an embodiment of the present invention.
- Table 5 below is a table illustrating elements indicating whether an argument or an operator is unary by assisting the above-described elements according to an embodiment of the present invention.
- Table 6 illustrates a type element used when declaring a variable or a port according to an embodiment of the present invention.
- Table 7 below is a table illustrating additionally defined elements in addition to the above-described elements according to an embodiment of the present invention.
- Attribute There are 4 types of elements that represent additional information about the connection relationship of the decoding module1. flag: name information 2. String attributes: information about the statement 3. Value attributes: Representation by Expr element. Custom attributes: Any kind of information. Additional attributes: @ value- The value of the string attributes. Additional child elements: The value of the Expr-Value attributes. QID Identifier indicating a position in the hierarchical structure ID Identifier Required attribute: @ id-identifier Class Required attribute of the decryption module: @name-The name of the class. Parameter Define the representation of the parameter. Required attributes: @ name-parameter name Required sub-elements: An expression for calculating the value of the Expr-parameter. Note Remark
- connection control information and context control information may be described using elements described in Tables 3 to 7.
- connection control information and context control information may be described in XML as follows using the elements described in Tables 3 to 7. .
- connection control information and context control information may be described in XML as follows using the elements described in Tables 3 to 7. .
- FIG. 8 is a block diagram of a decoding model generator according to another embodiment of the present invention.
- the decoding model generator 440 includes a parser generator 810 and a model generator 820.
- the parser generation unit 810 generates a parsing module using syntax parsing control information and context control information received from the decoding module configuration information analysis unit 420. In this case, the generated parsing module may parse the corresponding bit stream structure in a limited manner.
- the parser generator 810 outputs the generated parsing module and the context control information to the model generator 820.
- the model generator 820 receives the connection control information from the decoding module configuration information analyzer 820.
- the model generator 820 generates a decoding model using the parsing module, the context control information, and the connection control information.
- the model generator 820 defines parsing of the decoding model using a parsing module.
- the model generator 820 defines a connection relationship between the decoding modules in the decoding model using the context control information and the connection control information.
- the decoding model may include an internal process of the decoding module or a reference address of the decoding module stored in the decoding module storage unit 430.
- the decryption model may include the entire decryption process or may refer to the decryption module of the decryption module storage unit 430 to represent the entire decryption process.
- the model generator 820 then outputs the decoding model to the decoding execution unit 450.
- the decoding execution unit 450 decodes the encoded data using the received decoding model. For example, the decoding execution unit 450 receives the encoded data from the separation unit 310 and parses the encoded data according to the parsing module defined in the decoding model. At this time, the decoding execution unit 250 may modify a part of the context control information by using the parsed information. Subsequently, the decoding execution unit 450 loads a necessary decoding module from the decoding module storage unit 430 according to the connection control information and the context control information defined in the decoding model, and decodes the encoded data.
- a decoding module for decoding the encoded data may be included in the decoding model.
- the decoding module configuration information may be converted into a hardware description language (HDL), and a hardware chip may be manufactured using the converted HDL.
- HDL hardware description language
- This method is widely compatible with designs based on codec chips that are widely used in set-top boxes, DTV converters, PMPs, and DMB players.
Abstract
Description
요소 이름 | 요소 유형 | 상위 요소 | 세부 정보 (facet) | |||
Type | ifNext | maxOccurs | rvc:Port | |||
VideoObject | Sequence | (root) | ||||
VOStartCode | Node | VideoObject | m4v:StartCodeType | |||
VOL | Sequence | VideoObject | ||||
Header | Node | VOL | VOLHeaderType | &volSC | #0 | |
VOP | Node | VOL | VideoObjectPlaneType | &vopSC | Unbounded | #1 |
요소 이름 | 요소 유형 | 요소 노드 | 세부 정보 (facet) | |
Type | rvc:Port | |||
TestStream | Sequence | (root) | (Hierarchical) | N/A |
Syntax1 | Syntax | TestStream | b3 | #1 |
Syntax2 | Syntax | TestStream | b4 | #2 |
Syntax3 | Syntax | TestStream | b2 | #3 |
Network | 복호모듈들이 연결된 구성의 식별 정보부가적 속성: @name-구성의 이름, @version-구성의 현재 버전부가적 하위 요소: Package, Decl, Port, Instance, Connection |
Package | QID(Qualified identifier, 계층적 구조에서 위치를 나타내는 식별자)를 나타내는 요소필수 하위 요소: QID |
Decl[@kind="Param"] | 복호 모듈 구성의 파라미터의 선언필수 속성: @name-파라미터의 이름부가적 하위 요소: Type-파라미터의 타입 |
Decl[@kind="Var"] | 변수의 선언필수 속성: @name-변수 이름필수 하위 요소: Expr- 변수의 값부가적 하위 요소: Type- 변수의 타입 |
Port | 복호 모듈 구성의 포트의 선언필수 속성: @name-포트의 이름, @kind-입력 또는 출력 포트 구별 정보부가적 하위 요소: Type-포트의 타입 |
Instance | 복호 모듈의 인스턴스 생성인스턴스 생성은 2가지의 파트로 이루어짐 : (1)복호 모듈의 클래스 , 파라미터 값의 리스트 정의, (2) 파라미터의 계산을 위한 expression(추후 설명) 정의 |
Connection | 복호 모듈 구성에서 두 개의 포트 사이의 연결 관계를 표현필수 속성: @src-소스 복호 모듈의 ID, @dst-대상 복호 모듈의 ID부가적 하위 요소: Attribute-Connection의 부가적 속성 |
Expr[@kind="Literal"] | 상수 |
Expr[@kind="Literal"][@literal-kind="Boolean"] | Boolean 타입의 상수필수 속성: @value-0 또는 1 |
Expr[@kind="Literal"][@literal-kind="Integer"] | Integer 타입의 상수필수 속성: @value-정수값 |
Expr[@kind="Literal"][@literal-kind="Real"] | Real 타입의 상수필수 속성: @value-정수값 |
Expr[@kind="Literal"][@literal-kind="String"] | String 타입의 상수필수 속성: @value-문장 |
Expr[@kind="Literal"][@literal-kind="Character"] | Character 타입의 상수필수 속성: @value-문자 |
Expr[@kind="Var"] | 변수필수 속성: @name-변수의 이름 |
Expr[@kind="Application"] | 특정 함수의 표현과 인수를 나타냄필수 속성: Expr- 함수의 표현, Args-인수 |
Expr[@kind="UnaryOp"] | 단항 연산 함수필수 하위 요소:Op-연산자 , Expr-연산수의 표현 |
Expr[@kind="BinOpSeq"] | 2항 연산함수필수 하위 요소: Op-연산자, Expr-연산수의 표현 |
Args | 함수의 인수필수 하위 요소: Expr-인수 표현 |
Op | 연산자가 단항인지 2항인지 구분필수 속성:@name-연산자 이름 |
Type | 데이터 타입을 나타냄필수 하위 속성: @name-타입의 이름부가적 하위 요소: Entry- 객체를 파라미터와 연결하는 엔트리 |
Entry[@kind="Expr"] | 타입의 값 파라미터필수 속성:@name-파라미터의 이름필수 하위 요소:Expr-속성 값을 계산하는데 사용되는 표현 |
Entry[@kind="Type"] | 타입의 타입 파라미터필수 속성:@name-파라미터의 이름필수 하위 요소:Type-파리미터의 가능한 타입 |
Attribute | 복호 모듈의 연결 관계에 대한 추가적인 정보를 나타내는 요소4가지의 종류가 있음1. flag: 이름정보2. String attributes: 문장에 관한 정보3. Value attributes: Expr 요소에 의한 표현4. Custom attributes: 모든 종류의 정보부가적 속성:@value- String attributes의 값부가적 하위 요소: Expr- Value attributes의 값 |
QID | 계층적 구조에서 위치를 나타내는 식별자부가적 하위 요소: ID |
ID | 식별자필수 속성:@id-식별자 |
Class | 복호 모듈의 클래스필수 속성:@name-클래스의 이름 |
Parameter | 파라미터의 표현을 정의필수 속성: @name-파라미터 이름필수 하위 요소: Expr-파라미터의 값을 산출하기 위한 표현 |
Note | 주석 |
Claims (15)
- 입력 데이터의 부호화 형식에 기반하여 적응적으로 디코딩 프로세스를 구성하는 적응적 복호화 장치로서,외부로부터 수신된 입력 데이터로부터 복호 모듈 구성 정보 및 부호화된 데이터를 분리하여 출력하는 분리부;미리 정해진 단위의 부분 디코딩 프로세스를 수행하는 복수의 복호 모듈을 저장하는 복호 모듈 저장부;상기 복호 모듈 구성 정보에 따라 상기 부호화된 데이터를 분석하여 신택스 파싱 제어 정보 및 연결 제어 정보를 생성하여 출력하는 복호 모듈 구성 정보 해석부; 및상기 연결 제어 정보를 이용하여 상기 복호 모듈 저장부로부터 대상 복호 모듈들을 로딩하고 연결하여 재조합 디코더를 형성하며, 상기 재조합 디코더를 이용하여 상기 신택스 파싱 제어 정보에 따라 상기 부호화된 데이터를 디코딩하는 복호 실행부를 포함하는 적응적 복호화 장치.
- 제1 항에 있어서,상기 복수의 복호 모듈은,상기 신택스 파싱 제어 정보를 이용하여 상기 부호화된 데이터를 신택스 파싱하여 출력하는 파싱 모듈; 및신택스 파싱된 데이터를 디코딩하기 위한 복수의 프로세싱 모듈을 포함하는 적응적 복호화 장치.
- 제1 항 또는 제2항에 있어서,상기 파싱 모듈은,하나 이상의 출력 포트를 포함하는 출력부;상기 신택스 파싱 제어 정보를 이용하여 상기 부호화된 데이터를 구성하는 데이터의 길이 및 출력 포트 번호를 추출하는 정보 해석부;상기 부호화된 데이터로부터 상기 길이에 상응하는 부분 데이터들을 추출하는 파싱부; 및상기 출력 포트 번호에 따라 상기 부분 데이터들을 상응하는 출력 포트로 할당하여 상기 출력부로 제공하는 포트 할당부를 포함하는 것을 특징으로 하는 적응적 복호화 장치.
- 제1 항 내지 제3항 중 어느 하나의 항에 있어서,상기 신택스 파싱 제어 정보는 상기 부호화된 데이터를 구성하는 부분 데이터들의 순서, 길이 및 출력 포트 정보 중 하나 이상을 포함하는 것을 특징으로 하는 적응적 복호화 장치.
- 제1 항에 있어서,상기 연결 제어 정보는 상기 복수의 복호 모듈에 대한 포트 정보, 상기 복수의 복호 모듈 상호간 입출력 포트 연결 정보 및 상기 복수의 복호 모듈에 대한 계층적 구조에서의 위치에 대한 식별 정보 중 하나 이상을 포함하는 적응적 복호화 장치.
- 제1 항에 있어서,상기 복호 모듈 구성 정보가 이진 코드로 압축된 경우, 상기 이진 코드로 압축된 상기 복호 모듈 구성 정보를 복원하여 출력하는 복원부를 더 포함하는 것을 특징으로 하는 적응적 복호화 장치.
- 제1 항 또는 제6항에 있어서상기 복호 모듈 구성 정보는 XML(extensible markup language)에 기반하여 기술되는 것을 특징으로 하는 적응적 복호화 장치.
- 입력 데이터의 부호화 형식에 기반하여 적응적으로 디코딩 프로세스를 구성하는 적응적 복호화 장치로서,수신된 입력 데이터로부터 복호 모듈 구성 정보 및 부호화된 데이터를 분리하여 출력하는 분리부;미리 정해진 단위의 부분 디코딩 프로세스를 수행하는 복수의 복호 모듈을 저장하는 복호 모듈 저장부;상기 복호 모듈 구성 정보에 따라 상기 부호화된 데이터를 분석하여 신택스 파싱 제어 정보 및 연결 제어 정보를 생성하여 출력하는 복호 모듈 구성 정보 해석부;상기 연결 제어 정보를 이용하여 상기 부호화된 데이터의 복호화 과정에 필요한 대상 복호 모듈들 및 상기 대상 복호 모듈들간의 연결 관계를 나타내는 복호화 모델을 생성하는 복호화 모델 생성부; 및상기 복호화 모델을 이용하여 상기 복호 모듈 저장부로부터 상기 대상 복호 모듈들을 로딩하고 연결하여 재조합 디코더를 형성하고, 상기 재조합 디코더를 통해 상기 신택스 파싱 제어 정보에 따라 상기 부호화된 데이터를 신택스 파싱하고 디코딩하는 복호 실행부를 포함하는 적응적 복호화 장치.
- 적응적 부호화 장치가 입력 데이터의 부호화 형식에 기반하여 적응적으로 디코딩 프로세스를 구성하는 적응적 복호화 방법에 있어서,수신된 입력 데이터로부터 복호 모듈 구성 정보 및 부호화된 데이터를 분리하는 단계;상기 복호 모듈 구성 정보를 이용하여 상기 부호화된 데이터에 대한 신택스 파싱 제어 정보 및 연결 제어 정보를 생성하는 단계;미리 설정된 복수의 복호 모듈 중에서 상기 연결 정보에 따른 하나 이상의 복호 모듈을 로딩하고 연결하여 재조합 디코더를 형성하는 단계; 및상기 재조합 디코더를 통해 상기 신택스 파싱 제어 정보를 이용하여 상기 부호화된 데이터를 신택스 파싱하고 디코딩하는 단계를 포함하는 적응적 복호화 방법.
- 제9 항에 있어서,상기 재조합 디코더를 형성하는 단계는-상기 복호 모듈은 상기 부호화된 데이터를 신택스 파싱하기 위한 파싱 모듈 및 상기 신택스 파싱된 데이터를 디코딩하기 위한 복수의 프로세스 모듈을 포함함;상기 부호화된 데이터를 신택스 파싱하기 위한 파싱 모듈을 로딩하는 단계; 및상기 연결 제어 정보에 따라 상기 파싱 모듈의 후단에 상기 복수의 프로세스 모듈을 로딩하고 연결하여 상기 재조합 디코더를 형성하는 단계를 포함하는 것을 특징으로 하는 적응적 복호화 방법.
- 제9 항에 있어서,상기 재조합 디코더를 통해 상기 신택스 파싱 제어 정보를 이용하여 상기 부호화된 데이터를 신택스 파싱하고 디코딩하는 단계는,상기 신택스 파싱 제어 정보를 이용하여 상기 부호화된 데이터를 구성하는 부분 데이터들에 대한 길이 및 출력 포트 번호를 각각 추출하는 단계;상기 부호화된 데이터에서 추출된 상기 길이에 상응하는 부분 데이터를 추출하는 단계; 및상기 부분 데이터를 상기 출력 포트 번호에 상응하는 출력 포트에 할당하여 출력하는 단계를 포함하는 것을 특징으로 하는 적응적 복호화 방법.
- 제9 항에 있어서,상기 복호 모듈 구성 정보를 이용하여 상기 부호화된 데이터에 대한 신택스 파싱 제어 정보 및 연결 제어 정보를 생성하는 단계 이전에,상기 복호 모듈 구성 정보가 압축된 경우, 압축된 복호 모듈 구성 정보를 복원하는 단계를 더 포함하는 적응적 복호화 방법.
- 제9 항에 있어서,상기 신택스 파싱 제어 정보는 상기 부호화된 데이터를 구성하는 부분 데이터들의 순서, 길이 및 출력 포트 정보 중 하나 이상을 포함하는 것을 특징으로 하는 적응적 복호화 방법.
- 제9 항에 있어서,상기 연결 제어 정보는 상기 복수의 복호 모듈에 대한 포트 정보, 상기 복수의 복호 모듈 상호간 입출력 포트 연결 정보 및 상기 복수의 복호 모듈에 대한 계층적 구조에서의 위치에 대한 식별 정보 중 하나 상을 포함하는 적응적 복호화 방법.
- 적응적 부호화 장치가 입력 데이터의 부호화 형식에 기반하여 적응적으로 디코딩 프로세스를 구성하는 적응적 복호화 방법에 있어서,수신된 입력 데이터로부터 복호 모듈 구성 정보 및 부호화된 데이터를 분리하는 단계;상기 복호 모듈 구성 정보를 이용하여 상기 부호화된 데이터에 대한 신택스 파싱 제어 정보 및 연결 제어 정보를 생성하는 단계;상기 연결 제어 정보를 이용하여 상기 부호화된 데이터의 복호화를 위한 복호 모듈들 및 상기 복호 모듈들간의 상호 연결 관계를 나타내는 복호화 모델을 생성하는 단계;상기 복호화 모델을 이용하여 미리 설정된 복수의 복호 모듈 중에서 하나 이상의 복호 모듈을 로딩하고 연결하여 재조합 디코더를 형성하는 단계; 및상기 재조합 디코더를 통해 상기 신택스 파싱 제어 정보를 이용하여 상기 부호화된 데이터를 신택스 파싱하고 디코딩하는 단계를 포함하는 적응적 복호화 방법.
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US9083972B2 (en) * | 2005-07-20 | 2015-07-14 | Humax Holdings Co., Ltd. | Encoder and decoder |
KR101372418B1 (ko) * | 2007-10-19 | 2014-03-12 | (주)휴맥스 | 비트스트림 디코딩 장치 및 방법 |
TWI476761B (zh) * | 2011-04-08 | 2015-03-11 | Dolby Lab Licensing Corp | 用以產生可由實施不同解碼協定之解碼器所解碼的統一位元流之音頻編碼方法及系統 |
US10009606B2 (en) * | 2012-10-11 | 2018-06-26 | Nvidia Corporation | Low power context adaptive binary arithmetic decoder engine |
CN115860034B (zh) * | 2023-02-14 | 2023-06-20 | 北京紫光青藤微系统有限公司 | 解码方法、解码装置、解码芯片及扫码设备 |
CN117153215B (zh) * | 2023-10-26 | 2024-01-23 | 长鑫存储技术有限公司 | 一种控制电路和存储器 |
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US20060126744A1 (en) * | 2004-12-10 | 2006-06-15 | Liang Peng | Two pass architecture for H.264 CABAC decoding process |
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US6339616B1 (en) | 1997-05-30 | 2002-01-15 | Alaris, Inc. | Method and apparatus for compression and decompression of still and motion video data based on adaptive pixel-by-pixel processing and adaptive variable length coding |
US6148033A (en) | 1997-11-20 | 2000-11-14 | Hitachi America, Ltd. | Methods and apparatus for improving picture quality in reduced resolution video decoders |
JP3894280B2 (ja) | 2001-02-02 | 2007-03-14 | インターナショナル・ビジネス・マシーンズ・コーポレーション | Xmlデータの符号化方法、符号化されたxmlデータの復号化方法、xmlデータの符号化システム、符号化されたxmlデータの復号化システム、プログラムおよび記録媒体 |
US8884791B2 (en) * | 2004-06-29 | 2014-11-11 | St-Ericsson Sa | Keypad scanning with radio event isolation |
US7804903B2 (en) * | 2005-06-27 | 2010-09-28 | Intel Corporation | Hardware-based CABAC decoder |
-
2008
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-
2009
- 2009-04-10 WO PCT/KR2009/001847 patent/WO2009125993A2/ko active Application Filing
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Patent Citations (3)
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US20020176508A1 (en) * | 1994-10-11 | 2002-11-28 | Boyce Jill Macdonald | Methods and apparatus for decoding and displaying multiple digital images in parallel |
US20050265449A1 (en) * | 2004-05-29 | 2005-12-01 | Yoon Suk-Hyun | Methods, circuits, and computer program products for syntax parsing in H.264 compliant video decoders |
US20060126744A1 (en) * | 2004-12-10 | 2006-06-15 | Liang Peng | Two pass architecture for H.264 CABAC decoding process |
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US8774285B2 (en) | 2014-07-08 |
KR101419885B1 (ko) | 2014-07-16 |
KR20090107641A (ko) | 2009-10-14 |
WO2009125993A3 (ko) | 2010-01-07 |
US20110032985A1 (en) | 2011-02-10 |
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