摘要:
High-speed access to a multi-layered disk is to be realized. Each layer on a multi-layered disk includes an inside guard area 2, program area 3, and outer guard area 5 which are located in uniform radial positions in all layers. The uppermost layer has the recording direction from the inner side to the outer side of the disk, and the next layer has the recording direction from the outer side to the inner side of the disk such that opposite recording directions appear alternately. The radial position of the recording terminal end on the uppermost first layer coincides with the radial position of the start of record on the next second layer.
摘要:
Encoded data is reversely reproduced by decoding each picture only once and using only as many frame memory sections as are needed in a normal playback operation. A picture header detector detects a picture header from data read out from a video code buffer to identify the type of picture The picture type information controls a picture data selecting circuit for selecting frames of I and P pictures equal in number to the number of frame memory sections in a frame memory bank. The selected frames are supplied to an inverse VLC circuit to be decoded, starting at the head of a GOP with an I picture. The decoded I and P pictures are stored in the frame memory bank and transmitted to a display unit, starting with the temporally most recent picture and reading backward.
摘要:
The invention provides a a recording data production apparatus and method, a recording medium reproduction apparatus and method and a recording medium by which interruption of data can be prevented even when reproduction of data is performed in a different order from the order in which the data are recorded. When it is intended to allow reproduction of data in an order of a block A, a block B and a block D or in another order of the block A, a block C and the block D, in order to prevent underflow of data from a buffer memory of a reproduction apparatus, the block B is sectioned into sections B.sub.1 to B.sub.3 and the block C is sectioned into sections C.sub.1 to C.sub.3. Then, the lengths of the sections are set to a predetermined value, and the blocks are arranged in an order of the blocks A, B.sub.1, C.sub.1, B.sub.2, C.sub.3, B.sub.3, C.sub.3 and D. In each section, addresses of a jumping start point and a jumping destination are recorded as control information.
摘要:
Digital video data encoder and decoder operate to enable the low and high speed reproduction of variable rate encoded digital video data by reproducing and decoding intraframe encoded frames that are identified by previously reproduced intraframe encoded frames. In the encoder, digital video data is variable rate encoded, for example, intraframe and interframe encoded, entry points (i.e., beginning positions) of selected encoded video data are identified and which represent video frames that occur at predetermined intervals of time (e.g., 1, 2 and 4 seconds) in the video picture. Entry point data that identify these positions are generated and added to the encoded video data before the video data is recorded on a record medium. When the encoded data is reproduced from the record medium, the entry point data is extracted therefrom and stored, and a successive intraframe encoded frame identified by the extracted entry point data is reproduced and decoded. The invention further provides for a record medium having thereon the encoded digital video data, and also provides for an encoder and corresponding decoder which encode and decode, respectively, digital still image and audio data in which entry points refer to each of the still images and also to particular intervals of time of the audio data.
摘要:
The invention provides a a recording data production apparatus and method, a recording medium reproduction apparatus and method and a recording medium by which interruption of data can be prevented even when reproduction of data is performed in a different order from the order in which the data are recorded. When it is intended to allow reproduction of data in an order of a block A, a block B and a block D or in another order of the block A, a block C and the block D, in order to prevent underflow of data from a buffer memory of a reproduction apparatus, the block B is sectioned into sections B.sub.1 to B.sub.3 and the block C is sectioned into sections C.sub.1 to C.sub.3. Then, the lengths of the sections are set to a predetermined value, and the blocks are arranged in an order of the blocks A, B.sub.1, C.sub.1, B.sub.2, C.sub.3, B.sub.3, C.sub.3 and D. In each section, addresses of a jumping start point and a jumping destination are recorded as control information.
摘要:
The present invention provides remarkably improved availability in a data recording method and apparatus, a data recording medium, and a data reproducing method and apparatus. By recording additional information for data reproduction in each sector on a data reproducing medium as a subcode separately from data when the data is recorded in the unit of sector, reproduction of data can be controlled using the subcode, thus making it possible to remarkably improve the availability of the data recording medium.
摘要:
A data recording method is provided in which video data and plural channels of language data are divided into packets as units, and the video data and the plural channels of language data are recorded on a record medium along with the control information containing a flag designating a reproducing channel of the language data matched to a reproducing pattern of the video data. Thus it becomes possible to record video data and plural channels of language data on a record medium so that a reproducing channel for the language data matched to the reproducing pattern of the video data will be selected and the plural channels of language data matched to the reproducing pattern and the video data will be reproduced by a reproducing system.
摘要:
Encoding and decoding methods and apparatuses for storing and retrieving multi-channel data each encoded according to a different encoding method and stored in a multiplexed form utilize group information identifying each multi-channel data as belonging to a particular group.
摘要:
A data recording method is provided in which video data and plural channels of language data are divided into packets as units, and the video data and the plural channels of language data are recorded on a record medium along with the control information containing a flag designating a reproducing channel of the language data matched to a reproducing pattern of the video data. Thus it becomes possible to record video data and plural channels of language data on a record medium so that a reproducing channel for the language data matched to the reproducing pattern of the video data will be selected and the plural channels of language data matched to the reproducing pattern and the video data will be reproduced by a reproducing system.
摘要:
A video data transmission method and apparatus for transmitting video encoded data with intra-coded video data portions therein suitable for selective high speed reproduction. A first entry point is detected in the encoded data which corresponds to the position of a first intra-coded video data portion. At least one packet is generated on the basis of the decoded first entry point that includes position information relating to at least one second entry point and at least one additional information relating to the video encoded data. The second entry point exists in a forward direction or in a backward direction relative to the first entry point and corresponds to position of at least one second intra-coded video data portion. The packet is multiplexed at a predetermined position of the video encoded data, wherein the multiplexed video encoded data is suitable for selective high speed reproduction of the intra-coded video data portions.