摘要:
To perform a motion picture format conversion at high speed in a motion picture converting apparatus, the apparatus comprises: input device 101 for inputting a digital image signal constituted of blocks, each block being orthogonally transformed; a frame memory 102 for storing the digital image signal; block reading device 103 for reading the blocks or a macro block from the frame memory in response to a request; region dividing section controlling device 109 for sending a read request to the block reading device; component extracting device 104 for extracting a low-frequency component alone of the captured image signal; two low-resolution frame memories 105 for storing extracted information; motion detecting device 106 for detecting a motion in accordance with the information in the low-resolution frame memories; a region dividing section 113 including macro block classifying device 107 for labeling the macro block in response to a motion detection result by the motion detecting device and label storing device 114 for storing a label of the macro block; decoding device 110; an encoding section 111 for changing an encoding of the macro block in response to the label in the label storing device; and output device 112 for outward outputting the coded signal.
摘要:
A moving image receiving apparatus has a moving image decoding apparatus (303) for decoding received moving image data. The moving image decoding apparatus (303) comprises: a media buffer (401) for storing moving image data; an intra-map memory (402) for storing an intra-map indicating a location of an intrablock included in an interframe of the moving image data; a pseudo intraframe generator (404) that, based on an intra-map stored in the intra-map memory (402), extracts an image of an intrablock included in an interframe in order from a latest interframe accumulated in the media buffer (401), combines images of intrablocks extracted from a plurality of interframes, and thereby generates a pseudo intraframe; and a decoder (406) that starts to decode moving image data, using a pseudo intraframe. The moving image receiving apparatus can thus decode received moving image data from an arbitrary frame.
摘要:
A server (101) streams data coded by inter-frame prediction. The server (101) comprises: a transmission data generator (116) for causing an independently decodable key frame to be added with at least one difference frame following the key frame to create data of one transmission unit, and generating a buffering key frame added with information on the data of one transmission unit, the information including a frame number; and an output unit (114) for transmitting, with transmission timing of the key frame, a buffering key frame generated with a key frame that should be transmitted with the transmission timing, and transmitting an arbitrary frame with transmission timing of the difference frame. This can reduce buffering time for switching a terminal to play a stream between a plurality of terminals, allowing the switching to be done smoothly.
摘要:
A transfer-source terminal, a communication-destination terminal, and a nearby terminal existing in the neighborhood of transfer-source terminal are provided. The nearby terminal collects connectivity information for monitoring connectivity after terminal switching by performing a communication process with the communication-destination terminal, and transmits the connectivity information collected to the transfer-source terminal. The transfer-source terminal receives connectivity information from the nearby terminal by a connectivity information receiving unit, determines a transfer-destination terminal from among the nearby terminals according to connectivity information by a transfer-destination terminal determinating unit, and transfers a communication session with a communication-destination terminal to the transfer-destination terminal determined, by a session transferring unit.
摘要:
A multimedia title including sources of plural data-types such as a motion picture, still picture and text data, presentation methods of respective sources, and the data-types is edited in every frame, so that a video signal is created. Based on a scenario, the video signal is coded adaptively to respective data-types of each source. As a result, calculation volume is reduced and picture quality is improved.
摘要:
A video coding method and apparatus realize that a calculation amount required to perform a converting process operation of compression formats can be reduced, and also deterioration in an image quality, which is caused by this compression format converting process operation, can be reduced. A video converting unit includes added information processing means for using added information contained in an input bit stream in coding operation. This added information involves a motion vector, a motion prediction difference signal, a quadrature converting coefficient, and a quantizing value.
摘要:
An image coding system converting apparatus is arranged by employing input means 102 for sequentially reading an input bit stream, a decoder unit 103 for decoding inputted data, a data buffer 104 for saving either non-compression image data or image data being decoded in a half way, an added information buffer 105 for saving either added information related to image data or added information related to a coding system, an encoder unit 106 for encoding the image data read out from the data buffer 104 with reference to the added information read out from the added information buffer 105, and output means 107 for outputting the image data encoded by the encoder unit 106. Accordingly, it is provided an image coding system converting apparatus, and an image coding system converting method, capable of converting an image coded by one image coding system into another image coding system in a high speed, while suppressing a deterioration of an image quality, and also to provide a recording medium for recording thereon a computer readable program capable of executing the image coding system converting method.
摘要:
Moving picture transforming system which executes transformation of moving picture coding scheme at high speed and with less degradation of picture quality, in that there are provided a motion compensating means 42 for compensating an image based on the motion information output from the variable length decoding means; a moving picture decoding means 120 consisting of an image memory for storing a reference image used by the motion compensating means; a motion information memory portion 20 for storing the motion information output from the moving picture decoding means; a motion prediction controlling portion 60 for outputting a candidate of the motion vector and controlling execution of the motion prediction, based on the motion information accumulated in the motion information memory portion; a motion candidate memory 53 for storing a plurality of outputs of the motion prediction controlling portion in sequence; an adaptive motion predicting means 51 for performing the motion prediction of the image output from the moving picture decoding means based on motion candidates accumulated in the motion candidate memory and the searched information accumulated in the search information memory; and a moving picture coding portion 130 for performing the coding based on them.
摘要:
An image coding method includes: dividing a picture into tiles; coding the tiles to generate pieces of coded data each of which corresponds to a different one of the tiles; and generating a bitstream including the pieces of coded data. The coding of the tiles includes: generating a first code string by coding a first tile which is one of the tiles, without referring to coding information used in coding another one of the tiles; and adding a bit string after the first code string to make a bit length of first coded data which is one of the pieces of coded data, a multiple of a predetermined N bits, N being an integer greater than or equal to 2.
摘要:
An image coding method includes: dividing a picture into tiles; coding the tiles to generate pieces of coded data each of which corresponds to a different one of the tiles; and generating a bitstream including the pieces of coded data. The coding of the tiles includes: generating a first code string by coding a first tile which is one of the tiles, without referring to coding information used in coding another one of the tiles; and adding a bit string after the first code string to make a bit length of first coded data which is one of the pieces of coded data, a multiple of a predetermined N bits, N being an integer greater than or equal to 2.