Abstract: An apparatus and a method for encoding/decoding video data are disclosed. In one embodiment, the decoding apparatus includes: i) a toolbox unit configured to store a plurality of functional units, ii) a separation unit configured to receive a decoder description and separate the decoder description into schema information and connection control information and output the schema information and the connection control information. The decoding apparatus may further include iii) a parser configured to parse and output input bitstream by using the schema information, iv) a decoder forming unit configured to load and connect pertinent functional units from the toolbox unit based on the connection control information and to form a reconfigured decoder; and v) a decoding solution configured to decode the bitstream outputted from the parser by using the reconfigured decoder. At least one embodiment can reconfigure a decoder in various form by using the decoder description.

Abstract: Discussed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding/decoding video data by use of the bit precision.

Abstract: Discussed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding/decoding video data by use of the bit precision.

Abstract: Provided are a decoding apparatus and method. The decoding apparatus includes a repository and a configuration unit. The repository stores a plurality of functional units having an input port and an output port which are respectively represented as tokens. The configuration unit receives decoder description which includes an identifier of at least one of the functional units and connection relationship information between the functional units, selects each functional unit corresponding to the received identifier from the repository, and connects the selected functional units by using the token to configure a variable decoder. The decoding apparatus and method defines the connection relationships between a plurality of functional units that configure a decoder, and thus can quickly and dynamically configure a decoder suitable for various encoding schemes.

Abstract: A method and an apparatus for encoding and decoding video data are disclosed. A decoding apparatus in accordance with the present invention can include: a tool box unit configured to store a plurality of functional units; a decoder description analyzing unit configured to extract functional unit identification (FUID) from an inputted decoder description; a decoder forming unit configured to form a reconfigured decoder by loading and connecting pertinent functional units from the tool box based on the decoder description; and a decoding solution configured to decode input data by using the reconfigured decoder. The tool box unit can include a plurality of tool boxes in which the functional units are distinguished and stored according to their types. With the present invention, it is possible to reconfigure a decoder in various forms by use of the decoder description.

Abstract: Methods and devices are provided for down-sampling an image from H.264 to MPEG-4 at a high speed. The method for converting a first macro block having a first format into a second macro block having a second format includes: (a) determining a block mode of the second macro block and converting the first macro block into the second macro block with the determined block mode, when the number of intra macro blocks included in the first macro block satisfies a first condition; (b) determining a block mode of the second macro block and converting the first macro block into the second macro block with the determined block mode, when the number for inter macro blocks included in the first macro block satisfies a second condition; and (c) re-adjusting a motion vector of the second macro block, after the conversion of the first macro block into the second macro block is finished.

Abstract: Provided are a motion estimation device and method adaptive to change in illumination. The motion estimation method includes the steps of: generating a current frame pattern block and a reference frame pattern block for a reference frame block; calculating the sum of absolute differences (SAD) for candidate pattern blocks and determining the candidate pattern block corresponding to the SAD satisfying a predetermined condition among the calculated SAD as a motion vector; encoding the current frame block, and adding flag information indicating the addition of a mean pixel value applied to the encoded current frame block and identification information on the encoding mode as header information corresponding to the encoded current frame block.

Abstract: There are provided selective prediction encoding and decoding methods and selective prediction encoding and decoding devices. The selective prediction encoding device selects and performs one of an AC/DC prediction encoding method and an intra prediction encoding method which corresponds to the smaller of code amount from AC/DC prediction and an amount of AVC intra coding, records information indicating the selected encoding method in a header of a bit stream, and transmits the bit stream to the selective prediction decoding device. The selective prediction decoding device decodes the transmitted bit stream by the use of a decoding process corresponding to the information recorded in the header. Accordingly, it is possible to improve compression ratio and image quality by using the selective prediction encoding and decoding methods.

Abstract: Provided are bitstream encoding/decoding methods and devices. The decoder includes: a condition information extracting unit creating recognition information using syntax tree information indicating a hierarchical structure between syntax elements corresponding to bits of an input bitstream, respectively and rule description information indicating connectivity between the syntax elements; and a decoding unit decoding data contained in the bitstream into moving image data using the recognition information. Accordingly, it is possible to decode bitstreams encoded in a variety of types (syntax, semantics) corresponding to a variety of standards (for example, MPEG-1, MPEG-2, MPEG-4, and MPEG-4 AVC) by the use of the same information recognition method.

Abstract: A method of and an apparatus for encoding/decoding video data are disclosed. Included in the decoding apparatus are: a tool box that stores functional units; a decompression unit that receives a compressed decoder description and decompresses a CDDL-based decoder description; a decoder description analyzing unit that transforms the CDDL-based decoder description to an XML-based decoder description; an ADM generation unit that generates an abstract decoding model (ADM) using the XML-based decoder description; and a decoding solution that loads functional units stored in the tool box and decodes input data to video data by using the ADM or XML-based decoder description. With the present invention, it is possible to reconfigure and reconstruct a decoder in various way using the decoder description.

Abstract: An adaptive decoding apparatus and a method of adaptive decoding are disclosed.

Abstract: A coding/decoding device using a bit-precision is disclosed. A coding device includes a bit-precision selecting unit, selecting a bit-precision value according to data to be coded; and a coding unit, generating a bit-stream by coding the data according to the selected bit-precision value, whereas the selected bit-precision value is inserted into the bit-stream. With the present invention, video data can be entropy-coded by selectively determining the number of bits and there can be provided the decoding method with a little complexity which has not only the identical compression rate to the conventional entropy coding method but also no necessity of additional computation when video data is decoded.

Abstract: A method of encoding/decoding a video and an apparatus thereof are disclosed. An embodiment of the present invention provides an encoding/decoding method and apparatus thereof that can interpolate a frame to be skipped with the consideration of the property of the frame. Accordingly, an embodiment of the present invention can encode and decode by using a frame-skipping method having low complexity.

Abstract: Disclosed are a method of encoding/decoding video data and a device thereof. The device includes a toolbox, which stores a plurality of functional units, a reconstruction unit, which reconstructs a decoder description by receiving a compressed decoder description, a decoder description parsing unit, which converts the decoder description to an XML-based decoder description, an ADM generating unit, generates an abstract decoding model (ADM) by using the XML-based decoder description, and a decoding solution, which loads the plurality of functional units stored in the toolbox by using the ADM or the XML-based decoder description to decode input data to video data. With the present invention, it is possible to reconstruct and reassemble a decoder in various forms by using a decoder description.

Abstract: Disclosed are a bitstream decoding apparatus and a method thereof. The decoding apparatus can include: a decoder forming unit, configured to generate and output CSCI control information and connection control information by using partial decoder descriptions stored in a description storing unit; and a decoding solution, which selectively loads a plurality of functional units included in a toolbox by using the CSCI control information and the connection control information to decode a bitstream to video data. With the present invention, it is possible to decode various types of bitstreams according to each of various standards by using an identical information recognizing method.

Abstract: A decoding device and method are disclosed. With the present invention, a bit-stream, encoded by various formats according to each standard (e.g. MPEG-1, MPEG-2, MPEG-4 and MPEG-4 AVC), can be decoded by the same information recognizing method. A decoding device includes: a tool box including a plurality of functional units, each of which is realized to perform a predetermined process; and a decoder implementation unit controlling to selectively load the functional units and to decode inputted bitstream into video data by using partial decoder descriptions.

Abstract: Disclosed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding /decoding video data by use of the bit precision.

Abstract: Discussed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding/decoding video data by use of the bit precision.

Abstract: Discussed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding/decoding video data by use of the bit precision.

Abstract: Discussed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding/decoding video data by use of the bit precision.