Erasing device

Claim 2

An erasing device for erasing a signal recorded on memory means having blocks in each of which one of an audio signal and a video signal is recorded, comprising: a) erasing means for erasing a signal recorded in each of said blocks; and b) control means for controlling said erasing means so that, when one signal recorded in one of said blocks is erased, another signal related to said one signal and recorded in another track is erased, said control means including determining means for determining whether or not an audio signal related to a signal recorded in one of said blocks to be erased by said erasing means is present in said memory means.

Claim 3

An erasing device according to claim 1, wherein said memory means is a recording medium of a disk shape.

Claim 4

An erasing device according to claim 2, wherein said blocks are concentric tracks formed in said recording medium of a disk shape.

Claim 5

An erasing device according to claim 1, further comprising: c) display means for indicating the result of the determination by said determining means.

Claim 6

An erasing device according to claim 2, wherein said erasing means includes: A) a head for reproducing a signal recorded in each of said tracks; and B) means for supplying an erasing signal for erasing a signal recorded in each of said tracks to said head.

Claim 7

An erasing device for erasing a signal recorded on memory means having blocks in each of which an audio signal or a video signal is recorded, comprising: a) erasing means for erasing a signal recorded in each of said blocks; and b) control means for controlling said erasing means having a first erasing mode for controlling said erasing means so as to erase a signal recorded in one of said blocks, and a second erasing mode for controlling said erasing means so as to erase signals recorded in a plurality of blocks in which an audio signal is recorded and a block in which a video signal related to said audio signal is recorded, wherein said control means is arranged to search and erase the audio signal recorded in the plurality of blocks.

Claim 8

An erasing device for erasing a signal recorded on memory means having blocks in each of which an audio signal or a video signal is recorded, comprising: a) erasing means for erasing a signal recorded in each of said blocks; and b) control means for controlling said erasing means having a first erasing mode for controlling said erasing means so as to erase a signal recorded in one of said blocks, and a second erasing mode for controlling said erasing means so as to erase signals recorded in a plurality of blocks in which an audio signal is recorded and a block in which a video signal related to said audio signal is recorded, wherein said control means is arranged to search and erase the audio signal recorded in the plurality of blocks.

Claim 9

An erasing device according to claim 6, further comprising: c) selection means for selecting one of said first erasing mode and said second erasing mode.

Claim 10

An erasing device according to claim 7, wherein said control means includes a determining means for determining a kind of signal recorded in each of said blocks.

Claim 11

An erasing device for erasing a signal recorded on memory means having blocks in each of which an audio signal and a video signal is recorded, comprising: a) erasing means for erasing a signal recorded in each of said blocks; b) control means for controlling said erasing means having a first erasing mode for controlling said erasing means so as to erase a signal recorded in one of said blocks, and a second erasing mode for controlling said erasing means so as to erase signals recorded in a block in which an audio signal is recorded and a block in which a video signal is recorded, said control means including a determining means for determining a kind of signal recorded in each of said blocks; and c) selection means for selecting one of said first erasing mode and said second erasing mode in accordance with the result of the determination by said determining means.

Claim 12

An erasing device for erasing a signal recorded on memory means having blocks in each of which an audio signal and a video signal is recorded, comprising: a) erasing means for erasing a signal recorded in each of said blocks; b) control means for controlling said erasing means having a first erasing mode for controlling said erasing means so as to erase a signal recorded in one of said blocks, and a second erasing mode for controlling said erasing means so as to erase signals recorded in a block in which an audio signal is recorded and a block in which a video signal is recorded, said control means including a determining means for determining a kind of signal recorded in each of said blocks; and c) selection means for selecting one of said first erasing mode and said second erasing mode in accordance with the result of the determination by said determining means.

Claim 13

An erasing device according to claim 7, wherein said selection means selects one of said first erasing mode and said second erasing mode in accordance with the operation of an operational member which is manually operated.

Claim 14

An erasing device according to claim 6, wherein memory means is a recording medium of a disk shape.

Claim 15

An erasing device according to claim 11, wherein said blocks are concentric tracks formed in said recording medium of a disk shape.

Claim 16

An erasing device according to claim 9, wherein said memory means is a recording medium of a disk shape.

Claim 17

An erasing device according to claim 9, wherein said blocks are concentric tracks formed in said recording medium of a disk shape.

Claim 18

An erasing device according to claim 9, in which each of said blocks is of same size.

Claim 19

An erasing device according to claim 15, wherein said memory means is a recording medium of a disk shape.

Claim 20

An erasing device for erasing a signal recorded on memory means having blocks in each of which one of an audio signal and video signal is recorded, comprising: a) erasing means for erasing a signal recorded in each of said blocks; and b) control means for controlling said erasing means, said control means having a mode in which only either one of said audio signal or said video signal is erased, based on a result of discrimination of a kind of signal recorded on a block to be erased by said erasing means.

Claim 21

An erasing device for erasing a signal recorded on memory means having blocks in each of which one of an audio signal and video signal is recorded, comprising: a) erasing means for erasing a signal recorded in each of said blocks; and b) control means for controlling said erasing means, said control means having a mode in which only either one of said audio signal or said video signal is erased, based on a result of discrimination of a kind of signal recorded on a block to be erased by said erasing means.

Claim 22

An erasing device according to claim 17, further comprising: selection means for manually selecting a first mode in which only said audio signal is erased or a second mode in which only said video signal is erased.

Claim 23

An erasing device according to claim 17, wherein said memory means is a recording medium of a disk shape.

Claim 24

An erasing device according to claim 19, wherein said blocks are concentric tracks formed in said recording medium of a disk shape.

Claim 25

An erasing device according to claim 19, further comprising: c) display means for indicating the result of the determination by said determining means.

Claim 26

An erasing device according to claim 14, wherein each of said blocks is of the same size.