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1. 发明授权

US5845039A Time-base correction in a video recording/playback system 失效
公开(公告)号：US5845039A
公开(公告)日：1998-12-01
申请号：US431937
申请日：1995-05-01
申请人： Jung-Wan Ko , Alvin R. Balaban , Christopher H. Strolle
发明人： Jung-Wan Ko , Alvin R. Balaban , Christopher H. Strolle
IPC分类号： H04N5/956 , H04N5/935 , H04N9/79 , H04N9/797 , H04N9/82 , H04N9/83 , H04N9/84 , H04N9/896 , H04N9/898 , H04N11/02
CPC分类号： H04N9/797 , H04N9/7904 , H04N9/84 , H04N9/896 , H04N5/935 , H04N9/7921 , H04N9/8205 , H04N9/83 , H04N9/898
摘要： A video recording/playback system includes in its recording electronics time-base correctors both for luma signal and for color-under signal, the time-base corrector for luma signal being used to facilitate comb filtering and the time-base corrector for chroma signal being used to maintain luma/chroma tracking during recording. The video recording/playback system includes in its playback electronics time-base correctors both for played-back luma signal and for played-back color-under signal, the time-base corrector for played-back luma signal being used to facilitate comb filtering and the time-base corrector for played-back chroma signal being used to maintain luma/chroma tracking during playback. With appropriate switching, the same pair of time-base correctors can be used in both the recording and the playback electronics of a video recording/playback system. A detector in the recording electronics determines when there is substantial time-base error in the video signal received for recording and conditions the comb filtering of the luma signal during recording to be carried out in just the spatial domain and not in the frame-to-frame time domain. The recording electronics includes circuitry for signaling the playback electronics, via a recorded signal, that the comb filtering of the luma signal during recording was carried out in just the spatial domain and not in the frame-to-frame time domain. The playback electronics responds to such signaling to adapt the comb filtering of the played-back luma signal to suit.

2. 发明授权

US4775890A Phase detector 失效
标题翻译：相位检测器
公开(公告)号：US4775890A
公开(公告)日：1988-10-04
申请号：US62016
申请日：1987-06-11
申请人： Alvin R. Balaban , Steven A. Steckler
发明人： Alvin R. Balaban , Steven A. Steckler
IPC分类号： H03L7/085 , H03K5/26 , H03L7/06 , H03L7/091 , H04N3/16 , H04N5/08 , H04N5/12 , H04N5/04
CPC分类号： H04N5/12
摘要： A horizontal phase detector of a television apparatus receives an analog composite video signal that is sampled and digitized at a rate determined in accordance with a clock signal. The leading edge of a simulated sync pulse signal is computed from the digitized signal using interpolation. The phase detector also receives a second signal that is indicative of a transition edge of a horizontal oscillator signal. The timing of the transition edge is contained in first and second signal parts. The first part is a periodic signal having a transition edge coincident with that of the clock signal, and the second part is a skew signal that represents a fraction of the period of the clock signal. The leading edge of the computed sync pulse signal is phase-compared with the oscillator transition edge to generate a phase difference signal for synchronizing horizontal oscillator operation.

3. 发明授权

US4698679A Sync separator 失效
标题翻译：同步分隔符
公开(公告)号：US4698679A
公开(公告)日：1987-10-06
申请号：US857331
申请日：1986-04-30
申请人： Alvin R. Balaban , Steven A. Steckler
发明人： Alvin R. Balaban , Steven A. Steckler
IPC分类号： H04N5/08 , H04N5/10
CPC分类号： H04N5/08
摘要： A sync separator detects, in a corresponding part of the waveform of a video signal, the occurrence of the trailing edge of a corresponding sync pulse, in accordance with the rate of change of the video signal. Information obtained from the sync tip and the back porch portions of the corresponding sync pulse is used for generating a slice level signal. A comparator responsive to the slice level signal separates a sync signal from the video signal.
摘要翻译：根据视频信号的变化率，同步分离器在视频信号的波形的相应部分中检测相应同步脉冲的后沿的出现。从相应的同步脉冲的同步端和后沿部分获得的信息用于产生限幅电平信号。响应于限幅电平信号的比较器分离来自视频信号的同步信号。

4. 发明授权

US4517586A Digital television receiver with analog-to-digital converter having time multiplexed gain 失效
标题翻译：具有模数转换器的数字电视接收机具有时间复用增益
公开(公告)号：US4517586A
公开(公告)日：1985-05-14
申请号：US443929
申请日：1982-11-23
申请人： Alvin R. Balaban , Steven A. Steckler
发明人： Alvin R. Balaban , Steven A. Steckler
IPC分类号： H04N7/26 , H04N9/64 , H04N11/04 , H04N9/32
CPC分类号： H04N9/64
摘要： A digital television receiver includes an analog-to-digital converter having a controllable scaling factor and offset. To improve resolution of the digital samples, the scaling factor is increased and the offset is changed when the synchronizing and color reference burst portions of the composite video signal are being converted. In addition, the scaling can be greatly increased at selected times so that the phase of the color reference burst can be more accurately determined.
摘要翻译：数字电视接收机包括具有可控缩放因子和偏移量的模数转换器。为了提高数字样本的分辨率，当复合视频信号的同步和颜色参考突发部分被转换时，缩放因子增加并且偏移改变。此外，在选定的时间可以大大增加缩放，使得可以更精确地确定颜色参考突发的相位。

5. 发明授权

US4502078A Digital television receivers 失效
标题翻译：数字电视接收机
公开(公告)号：US4502078A
公开(公告)日：1985-02-26
申请号：US351307
申请日：1982-02-22
申请人： Steven A. Steckler , Alvin R. Balaban
发明人： Steven A. Steckler , Alvin R. Balaban
IPC分类号： H04N5/44 , H04N5/455 , H04N9/00 , H04N9/64
CPC分类号： H04N9/64 , H04N5/44
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.
摘要翻译：模拟载波信号及其边带包含被数字编码和处理的调制信息。解调和数字编码在单个过程中由模拟数字转换器完成，模数转换器响应于至少是包含载波信号的频带的带宽的两倍的频率的采样信号来采样模拟信号，以及其信息边带。模拟信号样本被数字编码，产生对应于基带信号分量的数字信息信号的频带。当用于电视接收机以产生数字信号样本时，模拟信号的频带可以包括声音和图像载波以及它们的音频和视频信息。通过相对于彩色副载波信号控制模拟载波信号的相位和频率，并从模拟载波导出采样信号，提供了视频信号解调的容易性。

6. 发明授权

US4243953A Voltage controlled oscillator presenting high impedance to parallel resonant tank circuit 失效
标题翻译：压控振荡器对并联谐振回路提供高阻抗
公开(公告)号：US4243953A
公开(公告)日：1981-01-06
申请号：US12811
申请日：1979-02-16
申请人： Alvin R. Balaban , Steven A. Steckler
发明人： Alvin R. Balaban , Steven A. Steckler
IPC分类号： H03B5/00 , H03B5/12 , H03L7/099 , H03L7/08
CPC分类号： H03L7/099 , H03B5/1209 , H03B5/1212 , H03B5/1221 , H03B5/1231 , H03B5/1243
摘要： A variable-frequency oscillator includes an oscillator portion coupled to a phase shifter and a controllable gain device for controlling the amount of phase-shifted signal reintroduced to the oscillator. The oscillator includes first and second transistors coupled at their emitters to a current source. The emitters of third and fourth transistors are coupled to bases of the first and second transistors, respectively. The base of the third transistor is coupled to a voltage source, and the base of the fourth transistor couples to the collector of the first to form a regenerative loop capable of oscillation. A parallel-resonant circuit is coupled between the collector of the first transistor and the voltage source for establishing a frequency-sensitive phase characteristic in the loop by which the quiescent frequency is determined. The phase shifter is coupled to a point on the regenerative loop. The controllable gain device is coupled to the output of the phase shifter and reinjects a variable-amplitude version of the phase-shifted signal to a second point on the loop for establishing the oscillation frequency.
摘要翻译：可变频率振荡器包括耦合到移相器的振荡器部分和用于控制重新引入振荡器的相移信号量的可控增益器件。振荡器包括在其发射极处耦合到电流源的第一和第二晶体管。第三和第四晶体管的发射极分别耦合到第一和第二晶体管的基极。第三晶体管的基极耦合到电压源，第四晶体管的基极耦合到第一晶体管的集电极，以形成能够振荡的再生回路。并联谐振电路耦合在第一晶体管的集电极和电压源之间，用于在确定静态频率的环路中建立频敏相位特性。移相器耦合到再生环路上的一个点。可控增益装置耦合到移相器的输出，并将相移信号的可变幅度版本重新注入到环路上的第二点以建立振荡频率。

7. 发明授权

US5412481A Time-base correction in a video recording/playback system 失效
标题翻译：视频录制/播放系统中的时基校正
公开(公告)号：US5412481A
公开(公告)日：1995-05-02
申请号：US839542
申请日：1992-02-24
申请人： Jung W. Ko , Alvin R. Balaban , Christopher H. Strolle
发明人： Jung W. Ko , Alvin R. Balaban , Christopher H. Strolle
IPC分类号： H04N5/956 , H04N5/935 , H04N9/79 , H04N9/797 , H04N9/82 , H04N9/83 , H04N9/84 , H04N9/896 , H04N9/898
CPC分类号： H04N9/797 , H04N9/7904 , H04N9/84 , H04N9/896 , H04N5/935 , H04N9/7921 , H04N9/8205 , H04N9/83 , H04N9/898
摘要： A video recording/playback system includes in its recording electronics time-base correctors both for luma signal and for color-under signal, the time-base corrector for luma signal being used to facilitate comb filtering and the time-base corrector for chroma signal being used to maintain luma/chroma tracking during recording. The video recording/playback system includes in its playback electronics time-base correctors both for played-back luma signal and for played-back color-under signal, the time-base corrector for played-back luma signal being used to facilitate comb filtering and the time-base corrector for played-back chroma signal being used to maintain luma/chroma tracking during playback. With appropriate switching, the same pair of time-base correctors can be used in both the recording and the playback electronics of a video recording/playback system. A detector in the recording electronics determines when there is substantial time-base error in the video signal received for recording and conditions the comb filtering of the luma signal during recording to be carried out in just the spatial domain and not in the frame-to-frame time domain. The recording electronics includes circuitry for signaling the playback electronics, via a recorded signal, that the comb filtering of the luma signal during recording was carried out in just the spatial domain and not in the frame-to-frame time domain. The playback electronics responds to such signaling to adapt the comb filtering of the played-back luma signal to suit.
摘要翻译：视频记录/回放系统在其记录电子装置中包括用于亮度信号和彩色信号的时基校正器，用于亮度信号的时基校正器用于促进梳状滤波，并且色度信号的时基校正器用于在录制过程中维持亮度/色度跟踪。视频记录/回放系统在其回放电子装置中包括用于回放亮度信号和回放彩色信号的时基校正器，用于回放亮度信号的时基校正器用于促进梳状滤波，播放色度信号的时基校正器用于在播放期间保持亮度/色度跟踪。通过适当的切换，可以在视频记录/回放系统的记录和回放电子设备中使用同一对时基校正器。记录电子装置中的检测器确定何时在接收的用于记录的视频信号中存在实质的时基误差，并且在记录期间对亮度信号的梳状滤波进行调节，以便仅在空间域中执行，而不是在帧 - 帧时域。记录电子装置包括用于通过记录信号发信号通知回放电子器件的电路，即在记录期间，仅在空间域而不是在帧到帧的时域中进行亮度信号的梳状滤波。播放电子设备响应于这种信令以适应回放亮度信号的梳状滤波。

8. 发明授权

US5218449A Nervous clock signal generator for video recorder 失效
标题翻译：用于录像机的神经时钟信号发生器
公开(公告)号：US5218449A
公开(公告)日：1993-06-08
申请号：US861580
申请日：1992-04-01
申请人： Jung W. Ko , Alvin R. Balaban , Christopher H. Strolle
发明人： Jung W. Ko , Alvin R. Balaban , Christopher H. Strolle
IPC分类号： H04N9/83 , H04N5/935 , H04N9/79 , H04N9/797 , H04N9/82 , H04N9/84 , H04N9/896 , H04N9/898
CPC分类号： H04N9/797 , H04N9/84 , H04N9/896 , H04N5/935 , H04N9/7921 , H04N9/8205 , H04N9/898
摘要： A video recorder for recording composite video signals includes an analog to digital converter for digitizing samples of the composite video signal being recorded. A sync separator separates horizontal synchronizing information from the composite video signal being recorded. Filtering separates the chrominance information portion of the composite video signal being recorded, and a down-converter mixes that separated chrominance information with a nervous carrier signal thereby to generate a color-under signal. A controlled oscillator generates a succession of pixel clock signals at a rate the frequency and phase of which are determined in accordance with an oscillator control signal, the rate being more than twice the frequency of the nervous carrier signal and setting the rate of the sampling by the analog to digital converter. A counter counts the number of pixel clock signals supplied by the controlled oscillator, and a frequency divider divides the count by a prescribed factor. A discriminator determines when the resulting submultiple of the count differs in frequency or phase from the horizontal synchronization separated from the composite video signal being recorded, to develop an error signal that is low-pass filtered to generate the oscillator control signal. This completes a phase-lock loop connection including the controlled oscillator, the counter, the frequency divider, the discriminator and the low-pass filter, which loop governs sampling during the analog to digital conversion of the composite video signal being recorded. The nervous carrier signal is derived from this same phase-lock loop.
摘要翻译：用于记录复合视频信号的视频记录器包括用于数字化所记录的复合视频信号的样本的模数转换器。同步分离器从正在记录的复合视频信号中分离出水平同步信息。滤波分离正在记录的复合视频信号的色度信息部分，下变频器将分离的色度信息与神经载波信号进行混合，从而产生彩色信号。受控振荡器以其频率和相位根据振荡器控制信号确定的速率产生一系列像素时钟信号，速率大于神经载波信号频率的两倍，并将采样速率设置为模数转换器。计数器对由受控振荡器提供的像素时钟信号的数量进行计数，并且分频器将计数器除以规定的因子。鉴别器确定所得到的计数的次数与频率或相位与正在记录的复合视频信号分离的水平同步的差异，以产生低通滤波以产生振荡器控制信号的误差信号。这完成了包括受控振荡器，计数器，分频器，鉴频器和低通滤波器的锁相环路连接，该回路控制在被记录的复合视频信号的模数转换期间的采样。神经载波信号来源于同一个锁相环。

9. 发明授权

US4703340A Frequency division multiplexed analog to digital converter 失效
标题翻译：频分复用模数转换器
公开(公告)号：US4703340A
公开(公告)日：1987-10-27
申请号：US858720
申请日：1986-05-02
申请人： Alvin R. Balaban , Leopold A. Harwood , Chandrakant B. Patel , Walter H. Demmer
发明人： Alvin R. Balaban , Leopold A. Harwood , Chandrakant B. Patel , Walter H. Demmer
IPC分类号： H04N5/14 , H04N9/64 , H04N11/04 , H04N5/00
CPC分类号： H04N9/64
摘要： A digital television receiver, having a line locked clock, includes a first digital phase locked loop which regenerates quadrature phase related subcarrier signals that are used to synchronously demodulate the chrominance signal components of composite video signals into color information signals. When nonstandard video signals (e.g., from a video tape recorder) are processed by the receiver, frequency instabilities in the line locked clock signal may cause the color information signals to be distorted. To compensate for this distortion, a second phase locked loop is synchronized to a reference signal generated by an analog oscillator. The analog reference signal is linearly added to baseband analog video signals provided by a tuner. The combined signals are digitized by an analog-to-digital converter and then filtered by parallel low-pass and band-pass filters to develop digital signals representing the video signals and the reference signal, respectively. The digital reference signal is used to synchronize the second phase locked loop, the control signals of which are used to compensate the first phase locked loop for frequency instabilities in the clock signal.
摘要翻译：具有线锁定时钟的数字电视接收机包括第一数字锁相环，其再生用于将复合视频信号的色度信号分量同步解调为彩色信息信号的正交相位相关副载波信号。当非标准视频信号（例如，来自录像机）由接收机处理时，线路锁定时钟信号中的频率不稳定性可能导致颜色信息信号失真。为了补偿这种失真，第二个锁相环与由模拟振荡器产生的参考信号同步。模拟参考信号线性地添加到由调谐器提供的基带模拟视频信号。组合的信号由模拟数字转换器数字化，然后通过并行低通和带通滤波器进行滤波，以分别开发表示视频信号和参考信号的数字信号。数字参考信号用于同步第二锁相环，其控制信号用于补偿第一锁相环中的时钟信号中的频率不稳定性。

10. 发明授权

US4636836A Phase locked loop system for providing a phase shifted output signal 失效
标题翻译：用于提供相移输出信号的锁相环系统
公开(公告)号：US4636836A
公开(公告)日：1987-01-13
申请号：US677524
申请日：1984-12-03
申请人： Steven A. Steckler , Alvin R. Balaban
发明人： Steven A. Steckler , Alvin R. Balaban
IPC分类号： H04N9/45 , H04N9/44 , H04N9/455
CPC分类号： H04N9/455
摘要： A phase locked loop system is described in the context of a digital television receiver. The system includes a band-pass filter which shifts the phase of burst samples provided to it by 33.degree.. This phase shift makes the zero-crossing points of the filtered burst signal coincident with the I color difference signal sampling phase relative to the unfiltered burst signal. The phase locked loop uses a zero-crossing phase detector to develop a control signal for a VCO. The oscillatory signal provided by the VCO has a frequency of, for example, four times the frequency of the burst, but shifted in phase relative to the burst to allow sampling composite video signal coincident with the phase of at least one of the I and Q color difference signals.
摘要翻译：在数字电视接收机的上下文中描述了锁相环系统。该系统包括带通滤波器，将提供给它的脉冲样本的相位移动33度。该相移使滤波的色同步信号的过零点相对于未滤波的色同步信号与I色差信号采样相位一致。锁相环使用过零相位检测器来形成VCO的控制信号。由VCO提供的振荡信号的频率例如是突发频率的四倍，但相对于脉冲串相位移位，以允许采样复合视频信号与I和Q中的至少一个的相位一致色差信号。

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