KR930020413A - Error correction encoding and decoding method of digital data recording and reproducing apparatus - Google Patents

Abstract

In recording and reproducing digital VCR, the IDC part and the DDC part of the data of SB unit are separated, and the internal code is added to each of them, and only the IDC part is used for error correction during variable speed playback. Not only can minimizing loss of valid data due to mismatching of SBs generated by traversing several tracks, but also has the advantage of simplifying the error correction process.

Description

Error correction encoding and decoding method of digital data recording and reproducing apparatus

Since this is an open matter, no full text was included.

2 is a diagram showing the detailed configuration of an error correction code encoder according to the present invention.

8 is a diagram showing the detailed configuration of the error correction code decoder of the present invention.

Claims (9)

It divides the image data of one screen into blocks, converts and encodes the image data in each block unit, adds an error correction code to the converted coded data, records the image data in sync block units, and plays back the recorded data in reverse order. A digital data recording / reproducing apparatus, comprising: an identification code and a first data code independently decodable in a sink block in which an error correction / decoding method of the video data is performed, and a second data code that can be decoded dependently by the first data code. And adding the first and second inner codes to the error correction coding method, respectively. The error correcting encoding method of claim 1, wherein the first data code is data reproduced during a trick play. The video data of one screen is divided into blocks, and the video data is classified into a first data code which can be independently decoded and a second data code which can be decoded dependently, and transform-coded by the first and second data codes. In the digital data recording and reproducing apparatus which adds first and second error correction codes, respectively, and records the image data in units of sync blocks, and reproduces the recorded data in reverse order at the time of recording, wherein the error correction decoding method of the image data is normal. During playback, the first and second data codes are decoded into the first and second error correction codes. In trick play, only the first data codes are decoded into the first error correction codes and error corrected by the decoding. Error correction coding method comprising the step of outputting only data. It divides the image data of one screen into blocks, converts and encodes the image data in each block unit, adds an error correction code to the converted coded data, records the image data in sync block units, and plays back the recorded data in reverse order. In the digital data recording and reproducing apparatus, the error correcting encoding apparatus independently decodes the first data code having the minimum coefficients for maintaining the critical resolution among the coded block data and the second and the second decodable data having the extra coefficients. Separating means for separating into codes, first internal encoder means for adding an inner code for error checking and correction to the separated first data code, and error checking and correction for the classified second data codes. Second internal encoder means for attaching an internal symbol for said first and second decodes to which said first and second internal symbols are added; Error-correction coding method comprising: a combining means for mixing the other code. The video data of one screen is divided into blocks, and the video data is classified into a first dataco that can be independently decoded and a second data code that can be decoded independently, and then transform-coded into the first and second datacoins. In the digital data recording and reproducing apparatus which adds first and second error correction codes, respectively, to record image data in units of sync blocks, and reproduces the recorded data in reverse order at the time of recording, the error correction decoding apparatus includes: Separation means for separating the second data code of the first data code, a first internal decoder for performing error checking and correction by a first internal code added to the first data code classified by the classification means; A second internal decoder for performing error checking and correction by a second internal code added to a second data code classified by the classification means, and the first and second An error correction code decoding device comprising a combining means for mixing the first data code and the second code data decoded by the internal-code decoder. 6. The apparatus according to claim 5, further comprising a shunt means for shunting and supplying the first data code decoded by the first internal code decoder to the combining means, wherein the combining means is supplied from the shunt means during variable speed regeneration. And a first data code to be selected. 7. The error correction code decoding apparatus according to claim 6, wherein said shunt means further comprises buffer means for buffering said first data code. 8. The error correction code decoding apparatus according to claim 7, wherein the buffer means is a buffer. ※ Note: The disclosure is based on the initial application.