Video signal recording and/or reproducing apparatus

A reproducing apparatus for reproducing video data recorded on a recording medium from said recording medium, converting said reproduced data to an analog video signal and producing a converted analog video signal, comprising:

• (A) reproducing means for reproducing the video data recorded in said recording medium from said recording medium and producing the reproduced video data;
• (B) memory means for temporarily memorizing the reproduced video data obtained from said reproducing means;
• (C) clock signal forming means for producing a first clock signal for writing the reproduced video data obtained from said reproducing means in said memory means and a second clock signal of different frequency from that of said first clock signal for reading the reproduced video data memorized in said memory means from said memory means, and for synchronizing the phases of said first and said second clock signals with each other;
• and
• (D) restoring means for restoring the analog video signal from the reproduced video data read out from said memory means.

A video signal recording and reproducing apparatus in which an analog video signal is digitized before being recorded on a recording medium, and the digitized video signal on said recording medium is reproduced from said recording medium and is converted to an analog signal, comprising:

• (A) converting means receptive of and digitizing the analog video signal and producing the digitized inputted analog video signal as video data;
• (B) first memory means for temporarily memorizing the video data produced by said converting means;
• (C) reproducing means for reproducing the video data recorded on said recording medium from said recording medium and providing the reproduced video data;
• (D) second memory means for temporarily memorizing the reproduced video data provided by said reproducing means;
• (E) control system forming means for producing a write control signal for writing the video data in said first or said second memory means and a read control signal of different frequency from that of said write control signal for reading the memorized video data from said first or said second memory means, supplying said write and said read control signals to said first memory means when said video signal is recorded and to said second memory means when said video signal is reproduced, and synchronizing the phases of said write and said read control signals with each other;
• (F) recording means for reproducing the reproduced video data read out from said first memory means on said recording medium;
• and
• (G) restoring means for restoring an analog video signal from the video data read out from said second memory means.

A data signal processing apparatus for either memorizing a data signal in a memory circuit or reading the memorized data signal from said memory circuit, comprising:

• (A) a memory circuit for once memorizing said data signal;
• (B) a clock signal forming circuit for producing a first clock signal and a second clock signal of different frequency from that of said first clock signal, and synchronizing the phases of said first and said second clock signals with each other;
• (C) a write control circuit for controlling the writing of the data signal in said memory circuit in accordance with the first clock signal produced from said clock signal forming circuit;
• and
• (D) a read control circuit for controlling the reading of the data signal in said memory circuit in accordance with the second clock signal produced from said clock signal forming circuit.