JPS63131287U - - Google Patents

Info

Publication number
JPS63131287U
JPS63131287U JP1988004588U JP458888U JPS63131287U JP S63131287 U JPS63131287 U JP S63131287U JP 1988004588 U JP1988004588 U JP 1988004588U JP 458888 U JP458888 U JP 458888U JP S63131287 U JPS63131287 U JP S63131287U
Authority
JP
Japan
Prior art keywords
signal
audio signal
decoding device
television
generating
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.)
Pending
Application number
JP1988004588U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of JPS63131287U publication Critical patent/JPS63131287U/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/084—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only
    • H04N7/085—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only the inserted signal being digital
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は加入者制テレビジヨン・システムの送
信部のブロツク図、第２図は第１図の送信部と共
に使用できる受信部のブロツク図である。 〔符号説明〕、１４：同期プロセツサ、１６，
２２，３０：ゲート、２４：クロツク、２６，３
８：分周器、２８：遅延回路、３６：ライン変調
器、４０：ラインカウンタ、４２：コンピユータ
、４４：アドレスゲート、４６：送信機、５０：
チユーナ、５４：ビデオ検波器、５６：デコーダ
、６２：同期発生器、６４：Ｄ／Ａ変換器、６６
：発振器、６８：音声変調器、５８，７０：組合
せ回路、７２：アドレスデコーダ、７４：スイツ
チ、７６：変調器、７８：フイルタ。 FIG. 1 is a block diagram of a transmitting section of a subscription television system, and FIG. 2 is a block diagram of a receiving section that can be used with the transmitting section of FIG. [Explanation of symbols], 14: Synchronous processor, 16,
22, 30: Gate, 24: Clock, 26, 3
8: Frequency divider, 28: Delay circuit, 36: Line modulator, 40: Line counter, 42: Computer, 44: Address gate, 46: Transmitter, 50:
tuner, 54: video detector, 56: decoder, 62: synchronization generator, 64: D/A converter, 66
: oscillator, 68: audio modulator, 58, 70: combinational circuit, 72: address decoder, 74: switch, 76: modulator, 78: filter.

Claims (1)

【実用新案登録請求の範囲】 コード化したテレビジヨン信号を加入者に送る
テレビジヨン・システムにおいて使用されるデコ
ード装置であつて、前記コード化したテレビジヨ
ン信号において、テレビジヨン信号のビデオ信号
の水平及び垂直のブランキング期間中の同期パル
スが抑制されており、前記テレビジヨン信号の音
声信号がデジタル音声信号にコード化されており
、かつ前記の抑制されたブランキング期間に前記
デジタル音声信号と、クロツク信号と、及び前記
加入者の各々の前記デコード装置を付勢して前記
コード化したテレビジヨン信号をデコードさせる
ための許可信号とが挿入されており、前記デコー
ド装置が、 (イ) 前記コード化したテレビジヨン信号からビ
デオ信号を検出するための第１の検出手段と、 (ロ) 前記検出されたビデオ信号から前記デジタ
ル音声信号と、前記クロツク信号と、及び前記許
可信号とを検出するための第２の検出手段と、 (ハ) 前記クロツク信号を受けるように接続され
ており、かつ前記クロツク信号により作動可能で
あり、前記のビデオの水平及び垂直のブランキン
グ期間のための同期パルスを発生するための独立
した同期パルス発生手段と、 (ニ) 前記デジタル音声信号をデコードして再構
成した音声信号を発生する手段と、 (ホ) 前記同期パルス発生手段からの前記の独立
して発生された同期パルスを、抑制された同期パ
ルスを有する前記の検出されビデオ信号と組み合
わせて、再構成したビデオ信号を発生する手段と
、及び (ヘ) 前記再構成した音声信号を前記再構成した
ビデオ信号と組み合わせてデコードしたテレビジ
ヨン信号を発生する手段と、 から成るデコード装置。[Claims for Utility Model Registration] A decoding device used in a television system that sends a coded television signal to a subscriber, the decoding device being used in a television system that sends a coded television signal to a subscriber. and a synchronization pulse during the vertical blanking period is suppressed, the audio signal of the television signal is encoded into a digital audio signal, and the digital audio signal during the suppressed blanking period; A clock signal and a permission signal for energizing the decoding device of each of the subscribers to decode the coded television signal are inserted, and the decoding device is configured to (a) decode the coded television signal; (b) detecting the digital audio signal, the clock signal, and the permission signal from the detected video signal; (c) a second detection means connected to receive said clock signal and operable by said clock signal for generating synchronization pulses for horizontal and vertical blanking periods of said video; (d) means for generating an audio signal obtained by decoding and reconstructing the digital audio signal; and (e) independently generating the audio signal from the sync pulse generating means. means for combining the detected sync pulses with the detected video signal having suppressed sync pulses to generate a reconstructed video signal; and (f) combining the reconstructed audio signal with the reconstructed video signal. A decoding device comprising means for generating a decoded television signal by combining the signals.
JP1988004588U 1978-12-04 1988-01-18 Pending JPS63131287U (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US96594078A 1978-12-04 1978-12-04

Publications (1)

Publication Number Publication Date
JPS63131287U true JPS63131287U (en) 1988-08-26

Family

ID=25510704

Family Applications (2)

Application Number Title Priority Date Filing Date
JP15732979A Pending JPS5588481A (en) 1978-12-04 1979-12-04 Method of coding and decoding video signal
JP1988004588U Pending JPS63131287U (en) 1978-12-04 1988-01-18

Family Applications Before (1)

Application Number Title Priority Date Filing Date
JP15732979A Pending JPS5588481A (en) 1978-12-04 1979-12-04 Method of coding and decoding video signal

Country Status (12)

Country Link
JP (2) JPS5588481A (en)
AU (1) AU526049B2 (en)
BR (1) BR7907803A (en)
CA (1) CA1150818A (en)
CH (1) CH661398A5 (en)
DE (1) DE2947943C2 (en)
FR (1) FR2443778B1 (en)
GB (1) GB2038137B (en)
GR (1) GR82329B (en)
IL (1) IL58735A (en)
MX (1) MX147755A (en)
NL (1) NL188137C (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336553A (en) * 1980-05-14 1982-06-22 Oak Industries Method of coding audio and video signals
US4340906A (en) * 1980-05-14 1982-07-20 Oak Industries Inc. Video signal coding by video signal polarity reversal on the basis of brightness level comparison
US4353088A (en) * 1980-05-14 1982-10-05 Oak Industries, Inc. Coding and decoding system for video and audio signals
US4621285A (en) * 1980-12-10 1986-11-04 Jerrold Division, General Instrument Corporation Protected television signal distribution system
CA1338158C (en) * 1982-07-15 1996-03-12 John D. Lowry Encryption and decryption (scrambling and unscrambling) of video signals
JPS59152786A (en) * 1983-02-18 1984-08-31 Sanyo Electric Co Ltd Scrambling system in catv broadcast
EP0119751B1 (en) * 1983-02-18 1987-09-30 Sanyo Electric Co., Ltd. Scrambling system of television signal
DE3479952D1 (en) * 1983-04-21 1989-11-02 Gen Instrument Corp Scrambling system for television video signal
US4594609A (en) * 1983-06-30 1986-06-10 Viewstar Inc. Scrambling system for television video signal
EP0133190A1 (en) * 1983-08-01 1985-02-20 Payview Limited Encoding and decoding of a television signal
US4745476A (en) * 1984-02-15 1988-05-17 Matsushita Electric Industrial Co., Ltd. Television sound signal processing apparatus
DE3432653C1 (en) * 1984-09-05 1986-01-16 Westdeutscher Rundfunk, Anstalt des öffentlichen Rechts, 5000 Köln Method for transmitting television programmes to authorised subscribers
FR2572612B1 (en) * 1984-10-31 1986-12-26 Cgv Comp Gen Videotech INTERFACE BETWEEN VIDEO DECODER AND TELEVISION RECEIVER
US4815129A (en) * 1985-01-02 1989-03-21 General Instrument Corp. Video encryption system
DE3638554A1 (en) * 1986-11-12 1988-05-26 Siemens Ag Method and arrangement for coding digital video signals
GB2216359B (en) * 1988-03-18 1992-05-20 Marconi Gec Ltd Synchronisation
AU6013394A (en) * 1993-01-15 1994-08-15 Nauchno-Proizvodstvennaya Firma 'elektronika Ltd.' Method of relaying data via teevision channels and a system for carrying out same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924530A (en) * 1972-06-30 1974-03-05
JPS5037972A (en) * 1973-08-09 1975-04-09
JPS5120623A (en) * 1974-08-14 1976-02-19 Matsushita Electric Ind Co Ltd SHINGODENSO HOSHIKI
JPS5169927A (en) * 1974-12-13 1976-06-17 Fujitsu Ltd TEREBIJON FUKUGOEIZO SHINGOHOSHIKI
JPS53113427A (en) * 1977-03-15 1978-10-03 Matsushita Electric Ind Co Ltd Sampling clock reproducer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184537A (en) * 1960-10-04 1965-05-18 Paramount Pictures Corp Subscription-television system employing suppression of synchronizing signals
FR1287695A (en) * 1960-10-04 1962-03-16 Paramount Pictures Corp Pay TV systems
US3485941A (en) * 1965-04-12 1969-12-23 R & R Research Ltd Television system with modified sync signals and auxiliary timing information
NL7016628A (en) * 1970-11-13 1972-05-16
US3919462A (en) * 1973-08-15 1975-11-11 System Dev Corp Method and apparatus for scrambling and unscrambling communication signals
FR2313825A1 (en) * 1975-06-06 1976-12-31 Telediffusion Fse DATA DISSEMINATION SYSTEM
US4095258A (en) * 1976-10-15 1978-06-13 Blonder-Tongue Laboratories, Inc. Apparatus for decoding scrambled television and similar transmissions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924530A (en) * 1972-06-30 1974-03-05
JPS5037972A (en) * 1973-08-09 1975-04-09
JPS5120623A (en) * 1974-08-14 1976-02-19 Matsushita Electric Ind Co Ltd SHINGODENSO HOSHIKI
JPS5169927A (en) * 1974-12-13 1976-06-17 Fujitsu Ltd TEREBIJON FUKUGOEIZO SHINGOHOSHIKI
JPS53113427A (en) * 1977-03-15 1978-10-03 Matsushita Electric Ind Co Ltd Sampling clock reproducer

Also Published As

Publication number Publication date
AU5309779A (en) 1980-06-12
NL7908569A (en) 1980-06-06
DE2947943A1 (en) 1980-06-26
DE2947943C2 (en) 1985-04-18
GB2038137A (en) 1980-07-16
CA1150818A (en) 1983-07-26
IL58735A (en) 1982-01-31
FR2443778B1 (en) 1986-04-11
MX147755A (en) 1983-01-10
AU526049B2 (en) 1982-12-16
FR2443778A1 (en) 1980-07-04
GR82329B (en) 1984-12-13
CH661398A5 (en) 1987-07-15
IL58735A0 (en) 1980-02-29
BR7907803A (en) 1980-07-29
NL188137C (en) 1992-04-01
JPS5588481A (en) 1980-07-04
NL188137B (en) 1991-11-01
GB2038137B (en) 1983-04-13

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