Method and apparatus for reproducing CD discs with audio as well as audio and video information

Claim 1

Apparatus for reproducing a disk (1) having provided on at least one side thereof a first region (1a) wherein only a prescribed digital signal is recorded and a second region (16) wherein a video signal subjected to frequency modulation and a prescribed digital signal are recorded together in a superposed state, comprising: a video memory (18) capable of storing an amount of video information for at least one field; means (19) for selecting said video information from said video memory and supplying said video information as a video output during reproduction of at least said first region; and control means (3-14) for reading said amount of video information for at least one field from said disk, writing said information into said video memory during reproduction of said second region, and reading said information from said video memory during reproduction of at least said first region to provide a video output.

Claim 4

A method of operating an information reproducing system capable of reproducing both a first type disk (1), on at least one side of which a first region (1a) wherein only a prescribed digital signal is recorded and a second region (1b) wherein a video signal subjected to frequency modulation and a prescribed digital signal are recorded together in a superposed state, and a second type of disk (1) whereon a prescribed digital signal is recorded in the entire recording region of said second disk, comprising the steps of: reading information recorded in a lead-in area at the beginning of the reproduction of each of said disks; judging from said information whether said disk to be reproduced is a first type disk; and immediately moving an information detection point of a pickup toward said second region to reproduce said second region with priority over any other region of said disk when said disk is said first type disk.

Claim 5

A method of operating an information reproducing system capable of reproducing both a first type disk (1), on at least one side of which a first region (1a) wherein only a prescribed digital signal is recorded and a second region (1b) wherein a video signal subjected to frequency modulation and a prescribed digital signal are recorded together in a superposed state, and a second type of disk (1) whereon a prescribed digital signal is recorded in the entire recording region of said second disk, comprising the steps of: reading information recorded in a lead-in area at the beginning of the reproduction of each of said disks; judging from said information whether said disk to be reproduced is a first type disk; and immediately moving an information detection point of a pickup toward said second region to reproduce said second region with priority over any other region of said disk when said disk is said first type disk.

Claim 7

A method of operating an information reproducing system capable of reproducing both a first type of disk (1), on at least one side of which a first region (1a) wherein only a digital audio signal is recorded and a second region (1b) wherein a video signal subjected to frequency modulation and a digital audio signal are recorded together in a superposed state, and a second type of disk (1) whereon a digital audio signal is recorded over the entire recording region of the disk, comprising the steps of: loading a disk into a playing position in said system; rotating said disk at a speed appropriate for reproducing a disk of said first type; moving a pickup (3) to an inner edge of the disk and reading a reference code from the disk; determining from said reference code whether said disk is of the first or second type; reproducing said disk directly if it is of the second type; if said disk is of the first type, accelerating said disk to rotate at a speed appropriate for reproducing said video signal; moving said pickup (3) to said second region and reproducing video and audio information recorded in said second region; during reproduction of said video and audio information in said second region, storing a predetermined portion of the video information corresponding to at least one frame in a memory (18); when reproduction of said second region has been completed, starting reproduction of said first region; and, during reproduction of said first region, displaying the at least one frame of video information stored in said memory (18).

Claim 8

A method of operating an information reproducing system capable of reproducing both a first type of disk (1), on at least one side of which a first region (1a) wherein only a digital audio signal is recorded and a second region (1b) wherein a video signal subjected to frequency modulation and a digital audio signal are recorded together in a superposed state, and a second type of disk (1) whereon a digital audio signal is recorded over the entire recording region of the disk, comprising the steps of: loading a disk into a playing position in said system; rotating said disk at a speed appropriate for reproducing a disk of said first type; moving a pickup (3) to an inner edge of the disk and reading a reference code from the disk; determining from said reference code whether said disk is of the first or second type; reproducing said disk directly if it is of the second type; if said disk is of the first type, accelerating said disk to rotate at a speed appropriate for reproducing said video signal; moving said pickup (3) to said second region and reproducing video and audio information recorded in said second region; during reproduction of said video and audio information in said second region, storing a predetermined portion of the video information corresponding to at least one frame in a memory (18); when reproduction of said second region has been completed, starting reproduction of said first region; and, during reproduction of said first region, displaying the at least one frame of video information stored in said memory (18).