ECL in a recording and reproduction device in which coefficient groups including coefficient data corresponding to low frequency components of the first axis in at least two overlapped coding blocks are not recorded by the same recording head

DETAILED DESCRIPTION An object of the present invnetion is to provide a recording a reproducing apparatus with image coding in which an image will never be dropped out in blocks even if a plurality of errors occur when digital video signals are recorded or reproduced with compression coding.
In a recording and reproducing apparatus with image coding according to the present invention, for recording process, overlap blocking means divides input digital video signals into data in two-dimensional coding blocks each having first and second axes and comprises a plurality of pixel data, in such a way that neighboring coding blocks are overlapped with each other so as to share at least one boundary pixel in a first-axis (for example, horizontal) direction.
Orthogonal transform means performs two-dimensional frequency conversion (for example, discrete cosine transform) for pixel data of coding blocks obtained by the overlap blocking means to generate coefficient data of individual frequencies.
Shuffling means divides the coefficient data obtained by the orthogonal transform means into a plurality of coefficient groups so that the coefficient groups do not have the same frequency component of the second (for example, vertical) axis at least in a frequency region in the coding blocks corresponding to low frequency components of the first (for example, horizontal) axis.
Recording means locates recording data so that the plurality of coefficient groups in the same coding block obtained by the shuffling means are recorded so as to be dispersed into separate regions on a recording medium, and it adds error correction codes for the coefficient data.
For a reproducing process, reproduction decoding means reproduces recording data from the recording medium and decodes the coefficient data of the individual coefficient groups, while it detects the presence or absence of an error of coefficient data.
Deshuffling means integrates coefficient data outputted from the reproduction decoding means into coding blocks for recording