• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An analog carrier signal and its sidebands contain modulated information which is to be digitally encoded and processed. Demodulation and digital encoding is accomplished in a single process by an analog-to-digital converter, which samples the analog signals in response to a sampling signal of a frequency which is at least twice the bandwidth of the band of frequencies containing the carrier signal and its information-bearing sidebands. The analog signal samples are digitally encoded, producing a band of digital information signals corresponding to baseband signal components. When used in a television receiver to produce digital signal samples, the band of analog signals may include both sound and picture carriers and their audio and video information. By controlling the phase and frequency of the analog carrier signal in relation to the color subcarrier signal, and deriving the sampling signal from the analog carrier, an ease in video signal demodulation is provided.
    公开号:SU1327807A3
    申请号:SU833554753
    申请日:1983-02-18
    公开日:1987-07-30
    发明作者:Алан Стеклер Стивен；Рюбен Балабан Альвин
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention relates to television, specifically to digital television receivers.
    The purpose of the invention is to reduce image distortion.
    The drawing shows a structural electrical circuit of a digital television receiver.
    The digital television receiver contains a high-frequency unit 1, an intermediate frequency filter 2, an intermediate frequency amplifier 3, an analog-to-digital converter 4, a digital band-pass filter 5, a demodulator 6 of a television signal, a block 7 for selecting horizontal and frame sync pulses, a digital-to-analog converter 8, 9, 10, and 11 low-pass filters of the red, green, and blue signals, a ondpHoro carrier signal extraction block 12, and a frequency divider 13.
    13278072
    Nala is fed to block 7 for the selection of lowercase and frame sync pulses. The reference signal extraction unit, la carrier, generates a signal of intermediate frequency carrier with a shift of 90, which is divided in frequency divider 13 by the desired sampling frequency. Analog-to-digital converter
    10 selects an analog intermediate frequency signal in response to a sampling signal and converts the sampling signal into a digital signal with a sampling signal frequency that satisfies the NykHest criterion for the pattern of information to be restored.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A digital television receiver containing a series-connected high-frequency block intermediate frequency filter, an amplifier of a digital television receiver operates as follows.
    The received high-frequency television image signal enters the high-frequency block 1, where it is extracted and converted into an intermediate signal. From the output of high-frequency block 1, the converted image signal is fed to analog-digital converter 4 through a filter
    2 intermediate frequency and amplifier
    3 intermediate frequency, the signal from the output of which is fed to the block 12 of the selection of the reference signal carrier, the selected signal from which through the divider 13 frequency enters the control input of the analog-digital converter 4, digital signals
    from which include both video and audio information. A digital signal is applied to a demodulator 6 of a television signal, at the output of which signals of red, green and blue are formed. From the output of the modulator 6, the signal is fed through a digital-to-analog converter 8 to the filters 9, 10 and 11 of the low frequencies of the signals of red, green and blue. Also, a digital signal from the output of the demodulator 6 of the television signal. Order 3396/59 Circulation 638
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    Random polygons pr-tie, Uzhgorod, st. Project, 4
    Invention Formula
    A digital television receiver containing a series-connected high-frequency block intermediate frequency filter, an intermediate frequency amplifier (IF amplifier) and an analog-to-digital converter (Alin) s digital band-pass filter, a serially connected television demodulator and a selection unit
    horizontal and frame sync pulses and a serially connected television signal demodulator and digital-to-analog converter (D / A converter), to the three outputs of which are connected
    the inputs of the low-pass filters of the red, green and blue colors, respectively, differ. In order to reduce the distortion of the image signal j
    The serially connected carrier reference selection unit and the frequency divider are introduced, which are capable of generating a frequency two times lower than the highest
    carrier frequency, and the output of the frequency divider is connected to the control input of the ADC, the information input of which is connected to the output of the PSA and the output of the ADC is connected to the input of the demodulator of the television signal, the output of which is connected to the input of the digital bandpass filter 5 to the output of UPCH,
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    类似技术:
    公开号 | 公开日 | 专利标题
    SU1327807A3|1987-07-30|Digital television set
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    GB2157909A|1985-10-30|Noise reduction circuit for composite color video signals
    GB2132443A|1984-07-04|Television transmission system
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    US4282545A|1981-08-04|Method and apparatus for playing back color video records through television receiver operating at a different color standard
    CA1326287C|1994-01-18|Frequency generation for extended bandwidth mac colortelevision encoding and decoding
    JPS6074893A|1985-04-27|Digital color decoder
    US3955211A|1976-05-04|Multiplex transmission of television audio-visual signals
    US2908751A|1959-10-13|Combined synchronous demodulator and brightness signal channel
    RU2054822C1|1996-02-20|Digital device for separation of brightness and color signals in pal and ntsc decoders
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    JPS5580980A|1980-06-18|Color television picture receiver
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    JP2522247B2|1996-08-07|Video playback circuit for video player
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    FR2402367A1|1979-03-30|Recording and reproduction of SECAM colour signals - requires separation of luminance and chrominance signals for frequency conversion
    JPS5521687A|1980-02-15|Recording unit and reproducing unit for color television signal
    JPS5923993A|1984-02-07|Circuit for improving signal-to-noise ratio of video signal
    JPS5461412A|1979-05-17|Recording and reproduction system of video signal
    同族专利:
    公开号 | 公开日
    FI830512A0|1983-02-15|
    JPS58154980A|1983-09-14|
    DE3305918A1|1983-09-01|
    PL240704A1|1983-09-12|
    GB2117988B|1986-02-05|
    IT8347738D0|1983-02-18|
    DK74483A|1983-08-23|
    JP2684030B2|1997-12-03|
    PT76249A|1983-03-01|
    YU42083A|1986-04-30|
    PT76249B|1986-03-19|
    ES8403262A1|1984-03-01|
    NL8300646A|1983-09-16|
    FR2522234A1|1983-08-26|
    DK74483D0|1983-02-21|
    ZA831145B|1984-04-25|
    IT1167616B|1987-05-13|
    KR840003947A|1984-10-04|
    PL137476B1|1986-06-30|
    FI73551C|1987-10-09|
    ATA60283A|1988-02-15|
    DD207797A5|1984-03-14|
    SE8300803L|1983-08-23|
    FR2522234B1|1986-04-11|
    FI73551B|1987-06-30|
    DE3305918C2|1993-04-01|
    SE8300803D0|1983-02-15|
    CA1204503A|1986-05-13|
    US4502078A|1985-02-26|
    AU1142483A|1983-09-01|
    AU560416B2|1987-04-09|
    GB8303808D0|1983-03-16|
    BE895965A|1983-06-16|
    ES519801A0|1984-03-01|
    KR920000580B1|1992-01-16|
    GB2117988A|1983-10-19|
    FI830512L|1983-08-23|
    NZ203347A|1986-03-14|
    DE3305918C3|1996-12-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3946432A|1974-10-10|1976-03-23|Cbs Inc.|Apparatus for digitally encoding a television signal|
    US4031549A|1976-05-21|1977-06-21|Rca Corporation|Television tuning system with provisions for receiving RF carrier at nonstandard frequency|
    JPS6115610B2|1978-05-30|1986-04-25|Mitsubishi Electric Corp|
    DE2854236C2|1978-12-15|1982-06-09|Deutsche Itt Industries Gmbh, 7800 Freiburg|Color television receiver with at least partially digital signal processing and with at least one integrated circuit for the luminance signal and the chrominance signals|
    GB2040640B|1979-01-26|1983-09-01|British Broadcasting Corp|Digitising an ntsc television signal|
    US4244027A|1979-03-19|1981-01-06|Rca Corporation|Digital open loop programmable frequency multiplier|
    US4218697A|1979-05-08|1980-08-19|William Leventer|Digital data transmission arrangement using a standard TV video|
    US4263611A|1979-08-29|1981-04-21|Rca Corporation|Television signal processing system|
    JPS56132881A|1980-03-21|1981-10-17|Mitsubishi Electric Corp|Television signal memory device|US4517586A|1982-11-23|1985-05-14|Rca Corporation|Digital television receiver with analog-to-digital converter having time multiplexed gain|
    US4514760A|1983-02-17|1985-04-30|Rca Corporation|Digital television receiver with time-multiplexed analog-to-digital converter|
    US4635102A|1984-10-24|1987-01-06|Rca Corporation|Chroma signal amplitude control apparatus|
    US4686570A|1985-12-24|1987-08-11|Rca Corporation|Analog-to-digital converter as for an adaptive television deghosting system|
    JPS6343482A|1986-08-11|1988-02-24|Sony Corp|Digital process circuit|
    US4811362A|1987-06-15|1989-03-07|Motorola, Inc.|Low power digital receiver|
    DE3743727A1|1987-12-23|1989-07-13|Itt Ind Gmbh Deutsche|TELEVISION RECEIVER WITH DIGITAL WORKING LEVELS|
    DE3816568A1|1988-05-14|1989-11-16|Bodenseewerk Geraetetech|METHOD AND DEVICE FOR DEMODULATING AN AC VOLTAGE SIGNAL|
    DE4235852A1|1992-10-23|1994-04-28|Thomson Brandt Gmbh|Controlling reception quality, e.g. of TV receiver - changes individual operating parameters after production of enable signal to improve signal=to=noise ratio|
    US5572264A|1994-02-14|1996-11-05|Hitachi, Ltd.|High definition TV signal receiver|
    DE4417724A1|1994-05-20|1995-11-23|Ant Nachrichtentech|Device for digitally demodulating the picture and sound components of a television signal|
    DE4417725A1|1994-05-20|1995-11-23|Ant Nachrichtentech|Device for digitally demodulating the picture and sound components of a television signal|
    DE4417723A1|1994-05-20|1995-11-23|Ant Nachrichtentech|Device for processing a modulated real-valued analog television signal|
    US5553140A|1994-05-26|1996-09-03|Sony Corporation Of Japan|Digital and analog interface for set back box|
    US5987209A|1994-08-05|1999-11-16|Funai Electric Co., Ltd.|Video signal receiver in which a reference signal is shared by a PLL circuit which sets the output frequency of a local RF-IF oscillator and by the chrominance signal generator|
    EP0727878B1|1995-01-23|2002-06-12|THOMSON multimedia|Circuit for A/D conversion of a video RF or IF signal|
    DE69621664T2|1995-01-23|2002-11-28|Thomson Multimedia Sa|Circuit arrangement for A / D conversion of a video signal with high or intermediate frequency|
    FR2734681B1|1995-05-23|1997-07-04|Thomson Multimedia Sa|PROCESS FOR DIGITIZING AN INTERMEDIATE FREQUENCY SIGNAL IF, IN PARTICULAR TELEVISION, AND CIRCUIT FOR IMPLEMENTING THIS PROCEDURE|
    FR2735316B1|1995-06-12|1997-07-18|Thomson Multimedia Sa|METHOD FOR DIGITIZING FI VIDEO SIGNALS AND DEVICE FOR CARRYING OUT SAID METHOD|
    US6046781A|1997-01-07|2000-04-04|Samsung Electronics Co., Ltd.|Automatic fine tuning of TV receiver for receiving both digital and analog TV signals|
    US6445425B1|1997-01-07|2002-09-03|Samsung Electronics Co., Ltd.|Automatic fine tuning of receiver for digital television signals|
    US6424825B1|1999-11-16|2002-07-23|Motorola, Inc.|Feedforward and feedback control in a radio|
    US7352411B2|2000-12-15|2008-04-01|Broadcom Corporation|Digital IF demodulator|
    US7106388B2|1999-12-15|2006-09-12|Broadcom Corporation|Digital IF demodulator for video applications|
    US7489362B2|2003-03-04|2009-02-10|Broadcom Corporation|Television functionality on a chip|
    US7373119B2|2002-03-07|2008-05-13|Telefonaktiebolaget Lm Ericsson |Method and apparatus for analog-to-digital conversion|
    KR100446945B1|2002-12-03|2004-09-01|엘지이노텍 주식회사|Auto control tuner having regular output level|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/351,307|US4502078A|1982-02-22|1982-02-22|Digital television receivers|
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