Method and system for retrieving video information from a non-CAV type recording disk in special reproduction modes

Claim 1

A method for playing back information recorded on a non-CAV type recording disk, said method using a pickup device having an information reading point and a memory device having a memory capacity for recording information corresponding to at least one field of video signal, comprising the steps of: radially moving said information reading point relative to the recording disk by a track jump operation repeatedly at intervals of N rotations of said recording disk across M recording tracks on said recording disk, in response to a special playback command wherein N is a real number and M is a multiple of N; writing predetermined portions of information picked up by said pickup device during periods between each of said track jump operations into said memory device, in order; and reading information stored in said memory device in succession, to provide playback information, said information reading point being positioned by said radial moving step to a location on the recording disk enabling stabilization of a time base error in the information caused by said track jump operation, during a time period preceding said writing step.

Claim 2

A method for playing back information recorded on a non-CAV type recording disk, said method using a pickup device having an information reading point and a memory device having a memory capacity for recording information corresponding to at least one field of video signal, comprising the steps of: radially moving said information reading point relative to the recording disk by a track jump operation repeatedly at intervals of N rotations of said recording disk across M recording tracks on said recording disk, in response to a special playback command wherein N is a real number and M is a multiple of N; writing predetermined portions of information picked up by said pickup device during periods between each of said track jump operations into said memory device, in order; and reading information stored in said memory device in succession, to provide playback information, said information reading point being positioned by said radial moving step to a location on the recording disk enabling stabilization of a time base error in the information caused by said track jump operation, during a time period preceding said writing step.

Claim 8

A system for playing back information recorded on a non-CAV type recording disk, said system using a pickup device having an information reading point, tracking control means connected to the pickup device for effecting track jump operations and a memory device having a memory capacity for recording information corresponding to at least one field of video signal, comprising: means responsive to a command corresponding to a special playback operation for radially moving said information reading point of said pickup device as a result of said track jump operations relative to said recording disk repeatedly at intervals of N times of rotations of said recording disk across M recording tracks on said recording disk, means for writing predetermined portions of the information picked up by said pickup device during periods between each of said track jump operations into said memory device, in order; and means for reading the information stored in said memory device in succession, to provide playback information for said special playback operation, said radial moving means including means determining the position to which the information reading point is radially moved for enabling stabilization of a time base error in the information, caused by said track jump operations, during a time period preceding said writing of the information.

Claim 9

A system for playing back information recorded on a non-CAV type recording disk, said system using a pickup device having an information reading point, tracking control means connected to the pickup device for effecting track jump operations and a memory device having a memory capacity for recording information corresponding to at least one field of video signal, comprising: means responsive to a command corresponding to a special playback operation for radially moving said information reading point of said pickup device as a result of said track jump operations relative to said recording disk repeatedly at intervals of N times of rotations of said recording disk across M recording tracks on said recording disk, means for writing predetermined portions of the information picked up by said pickup device during periods between each of said track jump operations into said memory device, in order; and means for reading the information stored in said memory device in succession, to provide playback information for said special playback operation, said radial moving means including means determining the position to which the information reading point is radially moved for enabling stabilization of a time base error in the information, caused by said track jump operations, during a time period preceding said writing of the information.