Abstract: A networking device and content transmitting method using the same are provided. The networking device includes a transmission path determining unit to determine a transmission path in order to transmit predetermined content to a device having requested the content, a priority determining unit to determine the priority of the content to be transmitted via the determined transmission path, and a content transmitting unit to transmit the concerned content via the determined transmission path according to the determined priority.

Abstract: An MPEG video decoding method and an MPEG video decoder are provided. The method includes determining whether to perform motion compensation on motion-vector-decoded data or not depending on a value of a decoded motion vector, determining whether to perform inverse discrete cosine transformation (IDCT) on motion-compensated data or not depending on values of decoded DCT coefficients, and generating a decoded image based on the results of the two determinations.

Abstract: An MPEG video decoding method and an MPEG video decoder are provided. The method includes determining whether to perform motion compensation on motion-vector-decoded data or not depending on a value of a decoded motion vector, determining whether to perform inverse discrete cosine transformation (IDCT) on motion-compensated data or not depending on values of decoded DCT coefficients, and generating a decoded image based on the results of the two determinations.

Abstract: Disclosed is a content displaying system and method using message communications. An embodiment of the system includes a server to store a large number of content therein, a device interface module to receive a message to display content or to receive content from the server, a device agent module for creating a message requesting content included in a list of content from the server, where the device interface module has received the message containing the content list and transmits it to the server through the device interface module, and for receiving the requested content from the server through the device interface module, a content processing module to convert the received content into a suitable output format, and a display apparatus including a display module to output the converted content.

Abstract: An MPEG video decoding method and an MPEG video decoder are provided. The method includes determining whether to perform motion compensation on motion-vector-decoded data or not depending on a value of a decoded motion vector, determining whether to perform inverse discrete cosine transformation (IDCT) on motion-compensated data or not depending on values of decoded DCT coefficients, and generating a decoded image based on the results of the two determinations.

Abstract: Provided are a video reproduction apparatus and method capable of effectively post-processing a video signal using a motion vector, a post-processed video signal and a difference video signal. The method includes the steps of (a) variable length decoding the compressed video signal to detect quantized discrete cosine transform (DCT) coefficients and a motion vector, when the compressed video signal is input as a bit stream; (b) inversely quantizing the quantized DCT coefficients detected in (a); (c) performing an inverse DCT (IDCT) on the DCT coefficients obtained in (a) to detect a difference video signal; and (d) selectively performing post-processing on the decoded video signal, based on the motion vector detected in (a) and the characteristics of the difference video signal detected in (c).

Abstract: Disclosed is a content displaying system and method using message communications. An embodiment of the system includes a server to store a large number of content therein, a device interface module to receive a message to display content or to receive content from the server, a device agent module for creating a message requesting content included in a list of content from the server, where the device interface module has received the message containing the content list and transmits it to the server through the device interface module, and for receiving the requested content from the server through the device interface module, a content processing module to convert the received content into a suitable output format, and a display apparatus including a display module to output the converted content.

Abstract: A networking device and content transmitting method using the same are provided. The networking device includes a transmission path determining unit to determine a transmission path in order to transmit predetermined content to a device having requested the content, a priority determining unit to determine the priority of the content to be transmitted via the determined transmission path, and a content transmitting unit to transmit the concerned content via the determined transmission path according to the determined priority.

Abstract: An apparatus and method for displaying contents are provided. The apparatus includes a device interface module automatically sensing a server connected to the display apparatus through a network and receiving content pushed according to a predetermined schedule and a control command from the server, a control and monitoring module receiving the control command from the device interface module, performing state control corresponding to the control command, and sensing a state change, a content processing module converting the content received from the device interface module into a format suitable for display, a display module outputting the content converted by the content processing module, and a device agent module analyzing information received through the device interface module and performing an operation according to the analyzed information.

Abstract: A method and apparatus for encoding a moving picture using a fast motion estimation algorithm are provided. The method includes motion estimation performed by obtaining motion vectors of representative sub-blocks of macroblocks each containing a plurality of sub-blocks, respectively, and by estimating motion vectors of all sub-blocks other than the representative sub-blocks using relationships among the motion vectors of the representative sub-blocks. In the method and apparatus, motion estimation requiring a large amount of computation in encoding a moving picture can be performed quickly and accurately.

Abstract: Disclosed is a method and apparatus for picture compression using a variable block of an arbitrary size, the method comprising: a first step of calculating motion vectors of desired variable blocks; a second step of dividing a screen into a plurality of blocks of arbitrary sizes according to the calculated motion vectors of the variable blocks; and a third step of determining motion vectors with respect to each of the plurality of blocks of the arbitrary sizes constructing the divided screen. Also, the method comprises a first step of compensating motion with respect to blocks of arbitrary sizes from which the motion vectors are decided; and a second step of transmitting block information of an arbitrary size for which the motion is compensated, in order, from a block disposed on the upper left of the screen to a block disposed on the lower right of the screen.

Abstract: Disclosed is a method and apparatus for a motion estimation using a variable block size of a hierarchy structure. The method includes: calculating each of a motion vector of a desired minimum unit variable block; determining a similarity of the calculated motion vectors between the minimum unit variable blocks in a higher hierarchy including the minimum unit variable block; establishing a mode of the variable block according to the determined similarity; and deciding a motion vector with respect to the mode established variable block. The complexity of the method of compressing a motion picture of a hierarchy structure having a plurality of block sizes can be reduced by selecting a mode of the optimal block size on the basis of a motion vector with respect to the minimum unit and the cost occurred at that time without performing the motion estimation with respect to each mode each time.

Abstract: A high-speed inverse discrete cosine transformation method and apparatus are provided. All elements of a discrete cosine transformation (DCT) matrix for elements having a value other than 0 are searched for in a predetermined order when a total number of elements having a value other than 0 is not greater than a predetermined critical value. Two-dimensional (2D) IDCT is performed on the elements having a value other than 0. 2D IDCT is performed on the DCT matrix when the total number of elements having a value other than 0 is greater than the predetermined critical value.

Abstract: An MPEG video decoding method and an MPEG video decoder are provided. The method includes determining whether to perform motion compensation on motion-vector-decoded data or not depending on a value of a decoded motion vector, determining whether to perform inverse discrete cosine transformation (IDCT) on motion-compensated data or not depending on values of decoded DCT coefficients, and generating a decoded image based on the results of the two determinations.

Abstract: A method and apparatus for fast inverse discrete cosine transform (IDCT) are provided. The fast IDCT method includes: (a) searching all elements of a discrete cosine transform (DCT) matrix in a predetermined order for non-zero elements; and (b) calculating the restored value of each element of a restoration matrix, by 2 dimensional-inverse DCT (2D-IDCT) transforming the non-zero elements of the DCT matrix by using the symmetry of an IDCT formula. According to the method and apparatus, unnecessary computation for 0's that are the majority of elements in a DCT matrix can be reduced to the minimum in performing the IDCT transform. In addition, even when the number of elements having effective values is large in a DCT matrix, the amount of computation is greatly reduced by using the symmetry of a DCT formula such that the method shows an excellent performance when statistically compared to the conventional fast DCT algorithms.

Abstract: Provided are a video reproduction apparatus and method capable of effectively post-processing a video signal using a motion vector, a post-processed video signal and a difference video signal. The method includes the steps of (a) variable length decoding the compressed video signal to detect quantized discrete cosine transform (DCT) coefficients and a motion vector, when the compressed video signal is input as a bit stream; (b) inversely quantizing the quantized DCT coefficients detected in (a); (c) performing an inverse DCT (IDCT) on the DCT coefficients obtained in (a) to detect a difference video signal; and (d) selectively performing post-processing on the decoded video signal, based on the motion vector detected in (a) and the characteristics of the difference video signal detected in (c).

Abstract: An apparatus and a method for removing block artifacts. The block artifacts removing apparatus has a decoding unit for decoding decoded image data, and a post-processing unit for post-processing to remove the block artifacts after extracting frame data in regard to the decoded image data and a compression attribute of the frame data from the decoding unit. Accordingly, the block artifacts removing apparatus can be applied to various systems since the block artifacts removing apparatus uses information generated from the decoder, and has a simple logic circuit.