GB1531215A - Squelch circuit - Google Patents
Squelch circuitInfo
- Publication number
- GB1531215A GB1531215A GB1555278A GB1555278A GB1531215A GB 1531215 A GB1531215 A GB 1531215A GB 1555278 A GB1555278 A GB 1555278A GB 1555278 A GB1555278 A GB 1555278A GB 1531215 A GB1531215 A GB 1531215A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- transistor
- squelch
- signals
- video
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 241001422033 Thestylus Species 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 230000002045 lasting effect Effects 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/7605—Television signal recording on discs or drums
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/903—Television signal recording using variable electrical capacitive recording
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/87—Regeneration of colour television signals
- H04N9/88—Signal drop-out compensation
- H04N9/882—Signal drop-out compensation the signal being a composite colour television signal
Abstract
1531215 Video disc players RCA CORPORATION 23 Oct 1975 [18 Nov 1974] 15552/78 Divided out of 1531214 Heading G5R In a video disc playback apparatus, a signal from player control circuits 111 (to raise the stylus from the playback position) initiates a squelch signal at 70 to block the output of video signals at 57, the initiation occurring when transistor 112 is blocked so taking the outputs of solenoids 113, 117 to a more positive potential and making transistor 80 conductive. When the player control circuit causes the stylus to be lowered, transistor 112 becomes conducting- making the anode of diode 121 negative so that, after a delay due to the charging of capacitor 83 which is sufficient to allow stabilization of the player circuitry, the squelch signal is terminated. During the play mode, squelch signals are generated in response to signals passing through diode 78 which indicate that a defect lasting more than approximately 50 ms. has been detected (by the potential on capacitor 77). During short duration defects the video signal is replaced by that from a preceding line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1555278A GB1531215A (en) | 1974-11-18 | 1975-10-23 | Squelch circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB49924/74A GB1531214A (en) | 1974-11-18 | 1974-11-18 | Squelch circuit |
| GB1555278A GB1531215A (en) | 1974-11-18 | 1975-10-23 | Squelch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1531215A true GB1531215A (en) | 1978-11-08 |
Family
ID=26251379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1555278A Expired GB1531215A (en) | 1974-11-18 | 1975-10-23 | Squelch circuit |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1531215A (en) |
-
1975
- 1975-10-23 GB GB1555278A patent/GB1531215A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19951022 |