Recorder and player for video digital video signals

Claim 2

An apparatus according to Claim 1, wherein the second video signal is sampled at a frequency 4/3 times greater than that for the first video signal.

Claim 3

A playback apparatus for reproducing a first digital video signal and a second digital video signal, which has a wider bandwidth than that of the first digital video signal, from a recording medium comprising: a reproducing means for reproducing a recoded data on the recording medium to a playback signal; an intraframe expanding means for converting the playback signal to a video signal of frame data through reverse of the two-dimensional orthogonal transformation; and an interframe inverse calculating means for calculating every two frames of the output signal of the intraframe expanding means to produce a set of a sum frame based on a pixel value sum of the two frames and a difference frame based on a pixel value difference between the two frames, in which when the recorded signal is the first video signal, the output of the intraframe expanding means is delivered as an output signal of the apparatus and when the recorded signal is the second video signal, the output of the interframe inverse calculating means is released as an output signal of the apparatus.

Claim 4

A video signal recording apparatus for selectively recording a first video signal which is a standard TV signal of digital format and a second video signal which is a digitized TV signal having a greater bandwidth than that of the first video signal comprising: an image dividing means for dividing each picture frame of the second video signal into n segments (n is a positive integer) ranging from the first segment data to the n-th segment data; an n number, first to n-th, of interframe calculating means for calculating every two frames of each segment data of the second video signal to produce a set of a sum frame based on a pixel value sum of the two frames and a difference frame based on a pixel value difference between the two frames; a first compressing means for compressing the output of the first interframe calculating means or the first video signal through two-dimensional orthogonal transformation in each frame; an (n-1) number, second to n-th, of compressing means for compressing the (n-1) outputs of the second to n-th interframe calculating means respectively through two-dimensional orthogonal transformation in each frame; and an n number, first to n-th, of recording means for recording the n outputs of the first to n-th compressing means respectively onto a recording medium.

Claim 5

An apparatus according to Claim 4, wherein the second video signal is sampled at a frequency two times greater than that for the first video signal.

Claim 6

A playback apparatus for reproducing a first digital video signal and a second digital video signal, which has a wider bandwidth than that of the first digital video signal, from a recording medium comprising: an n number, first to n-th, of reproducing means for reproducing a recoded data on the recording medium to n playback signals; an n number, first to n-th, of intraframe expanding means for converting the playback signals to n video signals of frame data respectively through reverse of the two-dimensional orthogonal transformation; an n number, first to n-th, of interframe inverse calculating means for calculating every two frames of the output signal of each intraframe expanding means to produce a set of a sum frame based on a pixel value sum of the two frames and a difference frame based on a pixel value difference between the two frames; and an image mixing means for combining frame by frame the n outputs of the first to n-th interframe inverse calculating means to a reconstruction of the second video signal, in which when the recorded signal is the first video signal, the output of the first intraframe expanding means is delivered as an output signal of the apparatus and when the recorded signal is the second video signal, the output of the image mixing means is released as an output signal of the apparatus.

Claim 7

A video signal recording apparatus for selectively recording a first video signal which is a standard TV signal of digital format and a second video signal which is a digitized TV signal having a greater bandwidth than that of the first video signal comprising: an image dividing means for dividing each picture frame of the second video signal into n segments (n is a positive integer) ranging from the first segment data to the n-th segment data; an n number, first to n-th, of interframe calculating means for calculating every two frames of each segment data of the second video signal to produce a set of a sum frame based on a pixel value sum of the two frames and a difference frame based on a pixel value difference between the two frames; a first compressing means for compressing the output of the first interframe calculating means or the first video signal through two-dimensional orthogonal transformation in each frame; an (n-1) number, second to n-th, of compressing means for compressing the (n-1) outputs of the second to n-th interframe calculating means respectively through two-dimensional orthogonal transformation in each frame; a composition/distribution means for receiving the n compressed outputs of the first to n-th compressing means and converting them into an m number (m is a positive integer) of recording signals; and an m number, first to m-th, of recording means for recording the m recording signals respectively onto a recording medium.

Claim 8

An apparatus according to Claim 7, wherein the second video signal is sampled at a frequency more than two times the sampling frequency of the first video signal.

Claim 9

A playback apparatus for reproducing a first digital video signal and a second digital video signal, which has a wider bandwidth than that of the first digital video signal, from a recording medium comprising: an m number, first to m-th, of reproducing means for reproducing m recoded data on the recording medium respectively to m playback signals; an inverse composition/distribution means for receiving the m playback signals and converting them into an n number of outputs of compressed form; an n number, first to n-th, of intraframe expanding means for converting the playback signals to n video signals of frame data respectively through reverse of the two-dimensional orthogonal transformation; an n number, first to n-th, of interframe inverse calculating means for calculating every two frames of the output signal of each intraframe expanding means to produce a set of a sum frame based on a pixel value sum of the two frames and a difference frame based on a pixel value difference between the two frames; and an image mixing means for combining frame by frame the n outputs of the first to n-th interframe inverse calculating means to a reconstruction of the second video signal, in which when the recorded signal is the first video signal, the output of the first intraframe expanding means is delivered as an output signal of the apparatus and when the recorded signal is the second video signal, the output of the image mixing means is released as an output signal of the apparatus.

Claim 10

An apparatus according to Claim 1, 4, or 7, wherein the interframe calculation means comprises a block format circuit for dividing each frame of the video signal into blocks and an interframe calculation circuit for producing a sum block from interframe addition and a difference block from interframe subtraction, and the compressing means comprises an orthogonal transform circuit for orthogonal transforming the sum and difference blocks and an encoding circuit for compressing the data of a plurality of medium blocks, each medium block being consisted of one sum block and one difference block, to a given amount of code form.

Claim 11

An apparatus according to Claim 10, wherein the orthogonal transform circuit performs either intraframe or intrafield orthogonal transform operation which is determined by interframe or interfield correlation separately in the sum and difference blocks.

Claim 12

An apparatus according to Claim 10, wherein orthogonal transformed data in the medium block are allocated in a spatial, time sequence from low frequency data to high frequency data.

Claim 13

An apparatus according to Claim 12, wherein in allocating the orthogonal transformed data in the medium block in a spatial, time sequence from low frequency to high, the orthogonal transformed data are arranged in an order of a sum block followed by a difference block when the orthogonal transform circuit selects an intraframe orthogonal transforming operation and in an order from a sum of sum block fields to a sum of difference block fields, a difference between difference block fields, and a difference between sum block fields when the orthogonal transform circuit selects an intrafield orthogonal transforming operation.