Digital video signal processing apparatus

Claim 2

A digital video signal processing apparatus comprising: reproduction means for reproducing an analog signal of a still image recorded on a disk-shaped recording medium and converting said reproduced analog signal into a digital signal;

Claim 3

adder means for adding at least a predetermined number of digital signals for the same image from said reproduction means to each other and outputting a digital video signal corresponding to said added predetermined number of digital signals; and signal processing means for accomplishing said digital video signal processing of said digital video signal derived from said adder means.

Claim 4

adder means for adding at least a predetermined number of digital signals for the same image from said reproduction means to each other and outputting a digital video signal corresponding to said added predetermined number of digital signals; and signal processing means for accomplishing said digital video signal processing of said digital video signal derived from said adder means.

Claim 5

An apparatus as set forth in Claim 1, said signal processing means converts said digital video signal derived from said adder means to an analog signal and delivers the analog signal to a telephone circuit.

Claim 6

An apparatus as set forth in Claim 2, wherein said reproduction means repeats at the times of said at least predetermined number the analog video signal corresponding to one horizontal scanning line derived from said medium, and said adder means has a plurality of memory parts whose number is equal to said predetermined number and stores the digital video signal for one scanning line reproduced by said reproduction means into each of said plurality of memory parts.

Claim 7

An apparatus as set forth in Claim 3, wherein said adder means has another memory part so that the digital video signals stored in said plurality of memory part are added and stored in said second mentioned memory part.

Claim 8

An apparatus as set forth in Claim 1, wherein said adder means divides said added digital signals by predetermined times so that result thus obtained becomes said digital video signal.

Claim 9

An apparatus as set forth in Claim 5, wherein said reproduction means repeatedly outputs for a predetermined number of times the digital signals each corresponding to each picture element included in one scanning line with in the same image, one of said digital signals being defined as one unit and said adder means produces a digital video signal for each unit of said digital signal.

Claim 10

An apparatus as set forth in Claim 6, wherein said reduction means comprises a magnetic head for reproducing the high frequency signals recorded on a magnetic floppy disk, a demodulation circuit for demodulating said high frequency signals into the analog signals corresponding to the intensity of light of an image and an A/D converter for converting said analog signal into the digital signal.

Claim 11

An apparatus as set forth in Claim 7, wherein said reproduction means comprises a magnetic head for reproducing a high frequency signal stored on a magnetic floppy disk, a demodulation circuit for demodulating said high frequency signal into an analog signal corresponding to the intensity of light of an image, an A/D converter for converting said analog signal into the digital signal and one or more line memories each storing as one unit said digital signal corresponding to each pixel included in one scanning line in the same image.

Claim 12

An apparatus as set forth in Claim 1, wherein said signal processing means accomplishes the gamma correction of said digital video signal.

Claim 13

A signal processing apparatus for transmitting a still video signal recorded on a recording medium to a telephone network and CRT, comprising: reproduction means for reproducing a predetermined number of times a predetermined still video signal from said recording medium; first memory means interconnected between said reproduction means and the telephone network; second memory means interconnected between said reproduction means and said CRT; adjustment means having a first mode in which a predetermined signal processing of said still video signal is carried out so as to transfer said reproduced still video signal to the telephone network and a second mode for inhibiting said predetermined signal processing of said reproduced still video signal, and control means which switches said adjustment means into said first mode when at least part of said reproduced still video signal is stored into said first memory means and switching said adjustment means into said second mode when at least part of said reproduced still video signal is stored into said second memory means.

Claim 14

A signal processing apparatus for transmitting a still video signal recorded on a recording medium to a telephone network and CRT, comprising: reproduction means for reproducing a predetermined number of times a predetermined still video signal from said recording medium; first memory means interconnected between said reproduction means and the telephone network; second memory means interconnected between said reproduction means and said CRT; adjustment means having a first mode in which a predetermined signal processing of said still video signal is carried out so as to transfer said reproduced still video signal to the telephone network and a second mode for inhibiting said predetermined signal processing of said reproduced still video signal, and control means which switches said adjustment means into said first mode when at least part of said reproduced still video signal is stored into said first memory means and switching said adjustment means into said second mode when at least part of said reproduced still video signal is stored into said second memory means.

Claim 15

An apparatus as set forth in Claim 10, wherein said adjustment means substantially linearly corrects the tone of said reproduced still video signal in said first mode of said adjustment means.

Claim 16

An apparatus as set forth in Claim 11, wherein said control means for causing said adjustment means to be switched into said second mode for at least part of a time interval for transmitting to said telephone circuit said still video signal stored in said first memory means.

Claim 17

An apparatus as sent forth in Claim 12 further comprising for replacing at least part of the still video signal stored in said first memory means by a predetermined signal.

Claim 18

An apparatus as set forth in Claim 13, wherein said replacement means is interconnected between said reproduction means and said adjustment means.

Claim 19

An apparatus as set forth in Claim 10, wherein said still video signal stored on said storing medium is an analog signal, and said apparatus comprises first conversion means for converting the analog video signal into the digital signal through said adjustment means, second conversion means for converting the digital signal stored in said first memory means into the analog signal and third conversion means for converting said digital signal stored in said second memory means into the digital signal.

Claim 20

Apparatus for processing a video signal having components representing respective constituent elements of a still image, said video signal having been reproduced from a disk-shaped recording medium, the apparatus being characterised by means for summing the corresponding components of a plurality of signals which have been successively reproduced from said recording medium and which each represents said image, whereby the resultant processed signal forms an average of said reproduced signals.

Claim 21

Apparatus for processing a video signal having components representing respective constituent elements of a still image, said video signal having been reproduced from a disk-shaped recording medium, the apparatus being characterised by means for summing the corresponding components of a plurality of signals which have been successively reproduced from said recording medium and which each represents said image, whereby the resultant processed signal forms an average of said reproduced signals.

Claim 22

Signal processing apparatus for processing a video signal representing a still image, the apparatus comprising means for receiving the video signal and for supplying the video signal to first and second memories, a first output for supplying the video signal as stored in said first memory to a display and a second output for supplying the video signal as stored in said second memory to a transmission means for transmission of the signal to a remote location, said receiving and supplying means being selectively operable to adjust the video signal so that the signal as stored in said second memory is suitable for transmission.

Claim 23

Signal processing apparatus for processing a video signal representing a still image, the apparatus comprising means for receiving the video signal and for supplying the video signal to first and second memories, a first output for supplying the video signal as stored in said first memory to a display and a second output for supplying the video signal as stored in said second memory to a transmission means for transmission of the signal to a remote location, said receiving and supplying means being selectively operable to adjust the video signal so that the signal as stored in said second memory is suitable for transmission.