Patent ID: 6029265
Filing Date: 2000-02-22
Classification: G11B

Abstract:
An error control device for detecting an error in a frame of variable length data, where, in said data,a first horizontal number of pixels in a horizontal direction of said frame and a vertical number of lines in a vertical direction of said frame are grouped into one slice, anda second horizontal number of pixels in the horizontal direction and said vertical number of lines constituting one slice in the vertical direction are grouped into one macroblock, so that one slice formed a plurality of macroblocks, said error control device comprising:an error detection code generator which generates and adds an error detection code to said data, said error detection code generator havinga first code generator which generates a horizontal error detection code in units of slices in the horizontal direction, anda second code generator which extracts macroblocks with the same ordinal number in respective slices, from one frame, and generates a vertical error detection code in units of macroblock groups, and an error detector, disposed in a reproducing system and reproducing said data on the basis of said error detection code, said error detector havinga first detector which detects an error in units of slices in the horizontal direction, anda second detector which detects an error in units of macroblock groups in the vertical direction.