摘要:
A method of dubbing compressed digital video signals (32) adopted for an apparatus (1-15) for efficient coding and subsequent recording/playback of video signals. In the method of dubbing compressed digital video signals, on a playback unit side (8-15), after padding error data by an error processing circuit with respect to an error uncorrectable in error correction by an ECC circuit (10) of playback, the digital video signal is provided with a parity for transmission by a parity generating circuit (6) and is then transmitted to a recording unit side (1-7). On the other hand, on the recording unit side (1-7), after padding error data by an error processing circuit with respect to an error uncorrectable in error correction by an ECC circuit (10) of transmission, the digital video signal is provided with a parity for recording by a parity generator (6) and is then recorded in a recording medium.
摘要:
Apparatus and methods are provided for variable length encoding (7) and transmitting (13, 14, 16) a plurality of predetermined portions of digital image signals which has been encoded to compress image data therein. Each of the plurality of predetermined portions is variable length encoded (7) to form a corresponding one of a plurality of variable length encoded portions. The amount of data in each of the portions is limited so that an amount of data contained in the corresponding variable length encoded portion is equal to or less than a predetermined target value. The variable length encoded portions are arranged (8, 10) in a plurality of sync blocks having a predetermined data length such that each portion is contained entirely within a respective number of sync blocks and the sync blocks are transmitted (13, 14, 16) via a transmission medium.
摘要:
An application ID is recorded in a timing sector (CTS') at an entrance end of a track (CT') on a recording medium for stipulating a data structure for the respective track including a determined number of areas into which the remainder of the track is divided, the positioning of those areas, and the arrangements of Sync. blocks and error correcting codes (ECC) in the areas. Further, each of the areas into which the track is divided in addition to the timing sector is provided with a respective application ID for determining the data structure in the respective area.
摘要:
Digital signal processing apparatus in which compressed frequency components of a digital signal are processed to selectively achieve fade-in, fade-out and scene change effects and where the digital signal is scrambled (and subsequently descrambled) in whole or in by scrambling (or descrambling) selected compressed frequency components of the digital signal.
摘要:
Digital signal processing apparatus in which compressed frequency components of a digital signal are processed to selectively achieve fade-in, fade-out and scene change effects and where the digital signal is scrambled (and subsequently descrambled) in whole or in by scrambling (or descrambling) selected compressed frequency components of the digital signal.
摘要:
A signal conversion apparatus (1) has a memory-stick connector (13) for mounting a memory stick (10), a PC-card connector (12) for mounting a PC card (9) and a cover for shielding and exposing the memory-stick connector and the PC-card connector from and to the external world. The cover has an opening for allowing a memory stick to be removed from or mounted on the memory-stick connector with the cover put in a state of shielding the memory-stick connector and the PC-card connector from the external world. As a result, a wrong storage medium can be prevented from being removed from or mounted on the signal conversion apparatus.
摘要:
Magnetic recording apparatus are provided for recording signals on a magnetic tape (102). A recording head (41) records signals in successive tracks on the tape and a tape transport transports a magnetic tape past the recording head in a recording direction. In one embodiment, absolute track addresses are recorded in at least some of the tracks, the absolute track address of each track corresponding to a distance of the track from a start position (43) of the magnetic tape. Recording is initiated from a track having a predetermined absolute track address corresponding to a predetermined distance from the start position. In a further embodiment, the tape transport transports the tape initially by a distance (R) necessary to establish a stable running state, and thereafter transports the tape a further distance (S) while recording reproduction control signals so that during reproduction a stable running state may be achieved. Thereafter, information to be output is recorded.
摘要:
A video tape recording apparatus records and reproduces digital video and audio signals in the form of coded signals that have a recording format which includes a video signal recording area for recording video data and its respective accompanying information, an audio signal recording area for recording video data and its respective accompanying information, insert and track information and subcode information. Preferably, the recording format includes packs having a pack header having a large data item and a small data item to indicate the format and use of the succeeding pack data. Errors in the recorded and reproduced audio and video signals are detected and the value of the respective accompanying information changed to prevent reading of erroneous stored data and thus prevent propagation of errors.