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公开(公告)号：KR850001309B1
公开(公告)日：1985-09-12
申请号：KR800003922
申请日：1980-10-13
Applicant: RCA CORP
Inventor： DIETERICH CHARLES B
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公开(公告)号：CA1149947A
公开(公告)日：1983-07-12
申请号：CA362176
申请日：1980-10-10
Applicant: RCA CORP
Inventor： CHRISTOPHER TODD J , DIETERICH CHARLES B
IPC: H04N5/91 , G11B5/02 , G11B9/06 , G11B27/10 , G11B27/30 , G11B27/36 , H04N9/44 , H04N9/77 , H04N9/82 , H04N9/87
Abstract: RCA 74, 436 IMPROVED DIGITAL ON VIDEO RECORDING AND PLAYBACK SYSTEM In a system for recording digital information on a video disc and for playback of the digital information therefrom, the digital data is recorded in synchronism with the color subcarrier signal on a horizontal line adjacent to a constant luminance line. This arrangement facilitates a video disc player having a simple, efficient, video-to-digital interface for separating the prerecorded digital information from the video signal. The player apparatus is responsive to the color subcarrier signal and the chrominance-related output signal of a comb filter, both of which are normally available during video signal processing. Prerecorded digital information representing field number and type of program content is used by a microprocessor controller to provide player features such as locked groove detection, program elapsed time display, and end of program indication. The microprocessor-to-player interface includes means responsive to the panel controls to operate the player mechanism and panel displays in accordance with the desired player features.
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公开(公告)号：CA1164806A
公开(公告)日：1984-04-03
申请号：CA394293
申请日：1982-01-15
Applicant: RCA CORP
Inventor： DIETERICH CHARLES B
Abstract: RCA 76373/76373A In a signal expander, the envelope of an input signal to be expanded is detected and applied as a control signal to the gain control input of a variable gain device which expands the input signal. The control signal is applied to the variable gain device via an adaptive filter having improved ripple reduction and transient performance characteristics to minimize audibility of gain changes. The adaptive filter includes a low pass filter for producing a smoothed control signal essentially free of ripple and an analog gate for coupling the greater of the smoothed signal or a further signal to the variable gain device, the further signal being equal to the detector output signal less a constant. Compression of an input signal is provided applying the input signal to the non-inverting input terminal of an amplifier and coupling the (compressed) output signal of the amplifier to its inverting input terminal via the expander.
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Patent Agency Ranking
公开(公告)号：PL227240A1
公开(公告)日：1981-07-10
申请号：PL22724080
申请日：1980-10-11
Applicant: RCA CORP
Inventor： DIETERICH CHARLES B , CHRISTOPHER TODD J
IPC: G11B5/09 , G11B20/10 , G11B20/18 , G11B27/10 , G11B27/30 , G11B27/34 , H04N5/76 , H04N5/92 , H04N9/79 , H04N9/82
Abstract: In a video disc system wherein each data field includes, as well as a video signal, a predetermined digital start code followed by a digital error code and digital information bits, the error code is a polynomial division code chosen so that for each data field an error code remainder register in the video disc player initially contains the predetermined start code rather than zero, and/or, if no errors are detected, finally contains the predetermined start code rather than zero. An arrangement is also described which, in response to the reading of a particular sequence of data from the disc indicating the end of the record, disables the read head.
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公开(公告)号：PL227239A1
公开(公告)日：1981-07-10
申请号：PL22723980
申请日：1980-10-11
Applicant: RCA CORP
Inventor： DIETERICH CHARLES B
IPC: G11B5/09 , G11B7/00 , H04N5/91 , G11B7/004 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/10 , G11B27/30 , G11B27/34 , H03M13/00 , H04N5/76 , H04N5/781 , H04N5/92 , H04N9/79 , H04N9/82 , G11B , H04N
Abstract: In a video disc recording and playback system, the video fields on the disc are identified by digital information recorded during the vertical blanking interval. The recorded digital information includes in the order named, a Barker start code sequence, an error detection coset code and information bits which include a field number corresponding to the video field being recorded. The arrangement results in improved noise immunity and simpler decoding hardware in the video disc player. The digital information is utilized to control a number of functions during the playing of a video disc record such as the calculation and display of elapsed playing time, lifting the stylus at the end of the program, and the detection and correction of locked groove conditions.
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公开(公告)号：PL227237A1
公开(公告)日：1981-07-10
申请号：PL22723780
申请日：1980-10-11
Applicant: RCA CORP
Inventor： CHRISTOPHER TODD J , DIETERICH CHARLES B
IPC: H04N5/91 , G11B5/02 , G11B9/06 , G11B27/10 , G11B27/30 , G11B27/36 , H04N9/44 , H04N9/77 , H04N9/82 , H04N9/87 , G11B , H04N
Abstract: Digital data is recorded as luminance level in synchronism with the colour subcarrier signal in one horizontal line period adjacent a constant (black) luminance line within the vertical banking interval between adjacent fields of video information on a video disc. The arrangement facilitates separation of the digital information by generating a difference signal between the data line and the black line using the comb filter already provided in the system. The digital data represents field number and type of program content and is used by a microprocessor controller to provide player features such as locked groove detection, program elapsed time display, and end of program indication.
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公开(公告)号：CA1154535A
公开(公告)日：1983-09-27
申请号：CA362174
申请日：1980-10-10
Applicant: RCA CORP
Inventor： DIETERICH CHARLES B
IPC: H04N5/91 , G11B5/09 , G11B7/00 , G11B7/004 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/10 , G11B27/30 , G11B27/34 , H03M13/00 , H04N5/76 , H04N5/781 , H04N5/92 , H04N9/79 , H04N9/82
Abstract: RCA 73,862 VIDEO DISC SYSTEM In a video disc recording and playback system, the video fields on the disc are identified by digital information recorded during the vertical blanking interval. The recorded digital information includes in the order named, a Barker start code sequence, an error detection coset code and information bits which include a field number corresponding to the video field being recorded. The arrangement results in improved noise immunity and simpler decoding hardware in the video disc player. The digital information is utilized to control a number of functions during the playing of a video disc record such as the calculation and display of elapsed playing time, lifting the stylus at the end of the program, and the detection and correction of locked groove conditions.
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公开(公告)号：CA1163365A
公开(公告)日：1984-03-06
申请号：CA370820
申请日：1981-02-13
Applicant: RCA CORP
Inventor： DIETERICH CHARLES B
Abstract: RCA 74,251 A current source supplies current to an integrator representative of a difference between the instantaneous and average values of a video signal having a PCM data component time division multiplexed with an analog luminance component. The integrator is enabled during the central portion of each PCM signaling interval and reset to a reference level during initial and terminal portions of the intervals. Asymmetry of the peak-to-peak PCM signal levels with respect to the average signal level tends to result in asymmetrical excursions of the integrator output voltage relative to the reference level. This asymmetry is corrected by means of a charge source that supplied a predetermined quantity of charge continuously or in discrete packets to the integrator during the central portion of each PCM signaling interval. The integrator voltage excursions are thereby equalized and a substantially uniform probability of detection of the PCM data levels may be realized by means of a threshold device having a threshold level substantially equal to the reference level.
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