US3908076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended play videodisc recording system
Assignee: Discovision Associates
•
Filing: 1974-01-28
•
Granted: 1975-09-23
•
Expires: 1994-01-28
Abstract
Abstract An improved recording format for a video disc is disclosed in which only one of the video frames of a consecutive plurality of frames is recorded. The sound corresponding to the recorded video frame and the omitted video frames is multiplexed and written with the recorded frame. On playback, the recorded frame is repeated a sufficient number of times to substitute for the omitted frames and each repeat is accompanied by the sound corresponding to the omitted frames in proper sequential order. A method of achieving this format in a circular or spiral track configuration is disclosed.
Inventors
- 👤 Kent D Broadbent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:57
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/7605; G; G11; G11B; G11B7/00; G11B7/004; G11B7/007; H04N5/91; H04N5/915; H04N5/9155
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
255 words
In combination with video disc writing apparatus including a turntable adapted to carry a disc, writing means including an arm, movable radially relative to the turntable and adapted to provide a modulated energy beam representing information to be recorded on the disc; and beam steering means in the writing arm for directing the energy beam in the radial direction; apparatus for producing an extended play video disc comprising: a. receiving means adapted to receive a complete video program signal transmission for recording on the video disc; b. audio extracting means coupled to said receiving means for separating the audio information portion from the video information portion of the received video program signal; c. timing means coupled to said receiving means and responsive to predetermined synchronization signals in the video signal transmission for producing gating signals; d. audio storage means for holding an audio portion of preselected duration, corresponding to a video program standard increment; e. combining means coupled to said audio extracting means and said audio storage means for providing a combination audio signal including the audio portions from at least two program standard increments; and f. write control means coupled to said timing means for applying to the writing means a modulating signal including the video portion of a selected program standard increment and the combination audio signal corresponding to the audio portion of the selected program standard increment and at least the last prior program standard increment, without modifying the video program standard increments or the sync or blanking intervals normally associated therewith.
Claim 2
Dependent Claim
255 words
In combination with video disc writing apparatus including a turntable adapted to carry a disc, writing means including an arm, movable radially relative to the turntable and adapted to provide a modulated energy beam representing information to be recorded on the disc; and beam steering means in the writing arm for directing the energy beam in the radial direction; apparatus for producing an extended play video disc comprising: a. receiving means adapted to receive a complete video program signal transmission for recording on the video disc; b. audio extracting means coupled to said receiving means for separating the audio information portion from the video information portion of the received video program signal; c. timing means coupled to said receiving means and responsive to predetermined synchronization signals in the video signal transmission for producing gating signals; d. audio storage means for holding an audio portion of preselected duration, corresponding to a video program standard increment; e. combining means coupled to said audio extracting means and said audio storage means for providing a combination audio signal including the audio portions from at least two program standard increments; and f. write control means coupled to said timing means for applying to the writing means a modulating signal including the video portion of a selected program standard increment and the combination audio signal corresponding to the audio portion of the selected program standard increment and at least the last prior program standard increment, without modifying the video program standard increments or the sync or blanking intervals normally associated therewith.
Claim 3
Dependent Claim
99 words
The combination of claim 1, above, further including: track selecting means coupled to said timing means and the writing means and the beam steering means, operable in response to said gating signals for directing the energy beam in a predetermined radial path relative to the disc for the recordation of a first selected program increment in a circumferential track and for returning the beam to a preselected point relative to the previously recorded increment for the recordation of the next selected program increment whereby a prescribed recording format can be followed despite arm travel during nonrecording intervals of time.
Claim 4
Dependent Claim
38 words
The combination of claim 2, above, wherein the prescribed recording format is a series of discrete circular tracks, each containing the video portion of a selecteD program increment and the audio portion of selected and omitted program increments.
Claim 5
Dependent Claim
39 words
The combination of claim 2, above, wherein the prescribed recording format is a continuous spiral in which each turn contains the video portion of a selected program increment and the audio portion of the selected and omitted program increments.
Claim 6
Dependent Claim
82 words
The combination of claim 2, above, further including gating means coupled to said receiving means, said combining means and said write control means, and operable in response to said gating signals to select for recordation, predetermined program increments from the program signal transmission, each selected program increment including a selected video portion and the audio portions of nonselected program increments, whereby the writing apparatus records discrete, temporally separated video program increments combined with all of the audio programs from the omitted increments.
Claim 7
Dependent Claim
34 words
The combination of claim 2, above, wherein every other program increment is selected for recordation and the audio portion of each omitted increment is combined with the audio portion of the following selected increment.
Claim 8
Dependent Claim
38 words
The combination of claim 2, above, wherein one of X consecutive video program increments is selected for recordation and the audio portions of the X consecutive program increments are combined and recorded with the selected video program increment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |