Method and apparatus for recovering information from a videodisc

Claim 1

A method for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks of concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, with an interval occurring between each two adjacent fields, and for repetitively reproducing any two adjacent fields of information, in a stop-motion mode, comprising the steps of: rotating the disc; impinging an incident reading beam of radiation upon the rotating disc to produce a modulated beam of reflected radiation indicative of the recorded information; moving said reading beam: and the disc radially relative to each other, to thereby cause and reading beam to impinge upon successive ones of the tracks; employing a tracking servo means to maintain alignment of said reading beam with said successive ones of the tracks; recovering said modulated beam; using said recovered modulated beam to reproduce the video information recorded in said successive one of the tracks; providing a control signal coincident with each occurrence of said reading beam impinging upon a location on an information track corrsponding to a point in the interval between adjacent fields of information; generating a stop-motion enable signal to thereby initiate the stop motion mode; generating a field step enable signal; detecting each said control signal provided subsequent to said field stop enable generating step; alternately passing and blocking said detected control signals; using each said passed signal to generate a jump pulse; and applying each said generated jump pulse to said tracking servo means, wherein said tracking servo means is resposive to each said generated jump pulse for incrementally jumping said reading beam backwards to impinge upon the immediately preceding adjacent information track, to thereby effectuate the stop-motion mode.

Claim 2

A method for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks of concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, with an interval occurring between each two adjacent fields, and for repetitively reproducing any two adjacent fields of information, in a stop-motion mode, comprising the steps of: rotating the disc; impinging an incident reading beam of radiation upon the rotating disc to produce a modulated beam of reflected radiation indicative of the recorded information; moving said reading beam: and the disc radially relative to each other, to thereby cause and reading beam to impinge upon successive ones of the tracks; employing a tracking servo means to maintain alignment of said reading beam with said successive ones of the tracks; recovering said modulated beam; using said recovered modulated beam to reproduce the video information recorded in said successive one of the tracks; providing a control signal coincident with each occurrence of said reading beam impinging upon a location on an information track corrsponding to a point in the interval between adjacent fields of information; generating a stop-motion enable signal to thereby initiate the stop motion mode; generating a field step enable signal; detecting each said control signal provided subsequent to said field stop enable generating step; alternately passing and blocking said detected control signals; using each said passed signal to generate a jump pulse; and applying each said generated jump pulse to said tracking servo means, wherein said tracking servo means is resposive to each said generated jump pulse for incrementally jumping said reading beam backwards to impinge upon the immediately preceding adjacent information track, to thereby effectuate the stop-motion mode.

Claim 9

A method for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks or concentric circular recorded vidoe information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, and for reproducing a selected portion of the recorded information in a field stepwise fashion, comprising the steps of: rotating the disc; providing a means for recovering said fields of recorded information from the information tracks; moving the disc and said information recovery means radially relative to each other, to recover successive ones of said fields of information; reproducing said recovered fields of information; generating a stop-motion enable signal, to thereby initiage the stop-motion mode; repeatedly reproducing the next two fields of information recovered subsequent to said generating step, said next two fields being defined as fields C and D, said fields C and D comprising a first information track; genernating a field-step-enable signal; incrementally jumping said information recovery means, in response to said field-step-enable signal, to a second information track containing two fields D and E of information, wherein said fields E and C are adjacent to opposite ends, respectively, of said field D; and repeatedly reproducing said two fields D and E.

Claim 10

A method for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks or concentric circular recorded vidoe information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, and for reproducing a selected portion of the recorded information in a field stepwise fashion, comprising the steps of: rotating the disc; providing a means for recovering said fields of recorded information from the information tracks; moving the disc and said information recovery means radially relative to each other, to recover successive ones of said fields of information; reproducing said recovered fields of information; generating a stop-motion enable signal, to thereby initiage the stop-motion mode; repeatedly reproducing the next two fields of information recovered subsequent to said generating step, said next two fields being defined as fields C and D, said fields C and D comprising a first information track; genernating a field-step-enable signal; incrementally jumping said information recovery means, in response to said field-step-enable signal, to a second information track containing two fields D and E of information, wherein said fields E and C are adjacent to opposite ends, respectively, of said field D; and repeatedly reproducing said two fields D and E.

Claim 11

A method for recovering recorded information from a plurality of spirally and substantially circular recorded video information tracks or concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks in cludes at least two fields of information, and for reproducing a selected portion of the recorded information in a field stepwise fashion, comprising the steps of: rotating the disc; providing a means for recovering selected fields of recorded information from the information tracks; moving the disc and said information recovery means radially relative to each other, to recover successive ones of said fields of information; reproducing said recovered fields of information; generating a stop-motion enable signal, to thereby initiate the stop-motion mode; repeatedly reproducing the next two fields of information recovered subsequent to said generating step, said next two fields being defined as fields C and D, said fields C and D comprising a first information track; generating a field-step-enable signal; incrementally jumping said information recovery means, in response to said field-step-enable signal, to a second information track containing two fields B and C of information, wherein said first and said second information tracks each contain said field C; and repeatedly reproducing said two fields B and C.

Claim 12

A method for recovering recorded information from a plurality of spirally and substantially circular recorded video information tracks or concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks in cludes at least two fields of information, and for reproducing a selected portion of the recorded information in a field stepwise fashion, comprising the steps of: rotating the disc; providing a means for recovering selected fields of recorded information from the information tracks; moving the disc and said information recovery means radially relative to each other, to recover successive ones of said fields of information; reproducing said recovered fields of information; generating a stop-motion enable signal, to thereby initiate the stop-motion mode; repeatedly reproducing the next two fields of information recovered subsequent to said generating step, said next two fields being defined as fields C and D, said fields C and D comprising a first information track; generating a field-step-enable signal; incrementally jumping said information recovery means, in response to said field-step-enable signal, to a second information track containing two fields B and C of information, wherein said first and said second information tracks each contain said field C; and repeatedly reproducing said two fields B and C.

Claim 13

An apparatus for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks or concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, wherein each pair of adjacent fields encompassed by all of the information tracks are separated by a vertical interval, and for repetitively reproducing any two adjacent fields of information, in a stop-motion mode, comprising: means for rotating the disc; means for impinging an incident reading beam of radiation upon the rotating disc to produce a modulated beam of reflected radiation indicative of the recorded information; means for moving said reading beam and the disc radially relative to each other, to thereby cause said reading beam to impinge upon successive ones of the tracks; means for recovering said modulated beam; means operatively connected to said recovering means for reproducing the recorded video information represented by said recovered modulated beam; means for generating a stop-motion enable signal to initiate the stop motion mode; means for providing a control signal coincident with each occurrence of said reading beam impinging upon a location on an information track corresponding to a point in the interval between adjacent fields of information; means for generating a field step enable signal to selectively operate in a field stop mode; means for detecting each said control signal provided subsequent to generation of said stop-motion signal; means for alternately passing and blocking said detected control signals; means responsive to each said passed signal for generating a jump pulse; and means for applying each said jump pulse to said tracking servo means, wherein said tracking servo means is responsive to each said jump pulse for incrementally jumping said reading beam backwards to impinge upon the immediately preceding adjacent information track, to thereby effectuate the stop-motion mode.

Claim 14

An apparatus for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks or concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, wherein each pair of adjacent fields encompassed by all of the information tracks are separated by a vertical interval, and for repetitively reproducing any two adjacent fields of information, in a stop-motion mode, comprising: means for rotating the disc; means for impinging an incident reading beam of radiation upon the rotating disc to produce a modulated beam of reflected radiation indicative of the recorded information; means for moving said reading beam and the disc radially relative to each other, to thereby cause said reading beam to impinge upon successive ones of the tracks; means for recovering said modulated beam; means operatively connected to said recovering means for reproducing the recorded video information represented by said recovered modulated beam; means for generating a stop-motion enable signal to initiate the stop motion mode; means for providing a control signal coincident with each occurrence of said reading beam impinging upon a location on an information track corresponding to a point in the interval between adjacent fields of information; means for generating a field step enable signal to selectively operate in a field stop mode; means for detecting each said control signal provided subsequent to generation of said stop-motion signal; means for alternately passing and blocking said detected control signals; means responsive to each said passed signal for generating a jump pulse; and means for applying each said jump pulse to said tracking servo means, wherein said tracking servo means is responsive to each said jump pulse for incrementally jumping said reading beam backwards to impinge upon the immediately preceding adjacent information track, to thereby effectuate the stop-motion mode.

Claim 21

An apparatus for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks or concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, and for reproducing a selected portion of the recorded information in a field stepwise fashion, comprising: means for rotating the disc; information recovery means for recovering said fields of recorded information from the information tracks; means for moving the disc and said information recovery means radially relative to each other to recover successive ones of said fields of information; means for reproducing said recovered fields of information; means for generating a stop-motion enable signal, to thereby initiate the stop-motion mode; means for repeatedly reproducing the next two fields of information recovered subsequent to initiation of the stop-motion mode, said next two fields being defined as fields C and D, said fields C and D comprising a first information track; means for generating a field-step-enable signal; means for incrementally jumping said information recovery means, in response to said field-step-enable signal, to a second information track containing two fields D and E of information, wherein said first information track and said second information track contain the same field D; and means for repeatedly reproducing said two fields D and E.

Claim 22

An apparatus for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks or concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, and for reproducing a selected portion of the recorded information in a field stepwise fashion, comprising: means for rotating the disc; information recovery means for recovering said fields of recorded information from the information tracks; means for moving the disc and said information recovery means radially relative to each other to recover successive ones of said fields of information; means for reproducing said recovered fields of information; means for generating a stop-motion enable signal, to thereby initiate the stop-motion mode; means for repeatedly reproducing the next two fields of information recovered subsequent to initiation of the stop-motion mode, said next two fields being defined as fields C and D, said fields C and D comprising a first information track; means for generating a field-step-enable signal; means for incrementally jumping said information recovery means, in response to said field-step-enable signal, to a second information track containing two fields D and E of information, wherein said first information track and said second information track contain the same field D; and means for repeatedly reproducing said two fields D and E.

Claim 23

An apparatus for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks or concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, and for reproducing a selected portion of the recorded information in a field stepwise fashion, comprising; means for rotating the disc; information recovery means for recovering said fields of recorded information from the information tracks; means for moving the disc and said information recovery means radially relative to each other, to recover successive ones of said fields of information; means for reproducing said recovered fields of information; means for generating a stop-motion enable signal, to thereby initiate the stop-motion mode; means for repeatedly reproducing the next two fields of information recovered subsequent to initiation of the stop-motion mode, said next two fields being defined as fields C and D, said fields C and D comprising a first information track; means for generating a field-step-enable signal; means for incrmentally jumping said information recovery means, in response to said field-step-enable signal, to a second information track containing two fields B and C of information, wherein said first and said second information tracks contain the same field C; and means for repeatedly reproducing said two fields B and C.

Claim 24

An apparatus for recovering recorded information from a plurality of spiralling and substantially circular recorded video information tracks or concentric circular recorded video information tracks formed in a record disc, wherein each of the tracks includes at least two fields of information, and for reproducing a selected portion of the recorded information in a field stepwise fashion, comprising; means for rotating the disc; information recovery means for recovering said fields of recorded information from the information tracks; means for moving the disc and said information recovery means radially relative to each other, to recover successive ones of said fields of information; means for reproducing said recovered fields of information; means for generating a stop-motion enable signal, to thereby initiate the stop-motion mode; means for repeatedly reproducing the next two fields of information recovered subsequent to initiation of the stop-motion mode, said next two fields being defined as fields C and D, said fields C and D comprising a first information track; means for generating a field-step-enable signal; means for incrmentally jumping said information recovery means, in response to said field-step-enable signal, to a second information track containing two fields B and C of information, wherein said first and said second information tracks contain the same field C; and means for repeatedly reproducing said two fields B and C.