Sony Corporation

Yasuo Seki

Tetsuo Kani

In a method for recording and/or reproducing digital data, such as digital audio signals recorded simultaneously with video signals, dividing sampling data composed of a plurality of bits into higher order bits and lower order bits, constituting error correction coding blocks by only the higher and lower order bits of the sampling data of a plurality of samples respectively, thereby making it possible to easily realize adaptive error checking in the course of the block-by-block error checking in association with, for example, data criticality. A sync word and a block address are affixed to the error correction coding block constituted in that manner. Since one block address is formed using the address data of two or more blocks, a broader address space can be obtained even when the bit number of the address area of each block is few. At least one flag bit(s) are provided in each sync word to use said flag bits in the blocks bearing specified block addresses as edit flags to set the edit flags in association with each edit point of digital signals, thereby facilitating discrimination of the editing points to reduce the rate of data discarding.

Method for transmitting digital data

In a high definition television system (HDTV), a video signal is recorded on and reproduced from oblique and successive parallel tracks on a magnetic tape, and an audio signal is recorded on and reproduced from a plurality of parallel tracks extending in a longitudinal direction of the tape. The tape is transported in its longitudinal direction during recording and reproduction. A tape position adjuster adjusts the position of the magnetic tape in its transport direction, and first and second transducing heads located at positions separated by a predetermined distance which may vary slightly because of manufacturing tolerances are employed for respectively reproducing and recording the audio signal. When the tape is edited, a processor connected to the first transducing head processes a reproduced audio signal and supplies it to the second transducing head, which records it accordingly. A controller responsive to an output signal of the adjuster controls the processor so as to shift the recording timing of the second transducing head as may be necessary to prevent the accumulation of recording timing errors during successive edits of the tape.

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Kanagawa, Japan

Yasuo Seki