Alvin R Balaban

6369857, Apr 9, 2002

May 13, 1999

09/311252

Alvin Reuben Balaban - Lebanon NJ
Michael Louie Low - Kendall Park NJ
Edward Coley Fox - Cranbury NJ

Sarnoff Corporation - Princeton NJ

H04N 546

348555, 348558

A receiver requiring only a single IF SAW filter and IF amplifier receives signals in both analog format and in digital format, such as the NTSC, PAL and SECAM analog television signal formats and the ATSC and DVB digital television signal formats. IF signals from the IF amplifier are sub-sampled to digital signal form and are processed by respective analog format and digital format processors. Control circuitry responsive to the presence of certain unique components of the signals in analog format and digital format determine which of the analog format and digital format processors is producing valid data and selects the valid data to be utilized. In a television receiver, the unique components of the signals may include carrier signals, synchronization signals, pilot signals and symbol timing, and valid data is applied to a television display.

6459458, Oct 1, 2002

Jun 15, 1999

09/333402

Alvin Reuben Balaban - Lebanon NJ

Sarnoff Corporation - Princeton NJ

H04N 552

348678, 348725, 4552321, 4552341, 375345

A digital AGC arrangement is responsive to the absolute value of a digital signal whose amplitude is to be gain controlled to generate an error signal. The digital value of the error signal is converted to an analog signal by a high-gain digital element such as a pulse width modulator or a comparator controlling a current source. The output thereof is filtered and applied to the gain control input of an amplifier whose gain is to be controlled thereby. This AGC is useful, for example, in a television receiver that includes an RF tuner, IF SAW filter and IF amplifier to receive television signals in both analog format, such as the NTSC, PAL and SECAM formats, and in digital format, such as the ATSC and DVB formats. IF signals from the IF amplifier are sub-sampled to digital signal form and are utilized for AGC, in addition to being processed by respective analog format and digital format processors.

42505259, Feb 10, 1981

May 9, 1979

6/037380

Steven A. Steckler - Clark NJ
Alvin R. Balaban - Lebanon NJ

RCA Corporation - New York NY

H04N 504

358148

An AFPC loop for TV horizontal oscillator suitable for use with sync signals subject to timing instability includes means for maintaining a long response time during the equalizing and vertical sync intervals to reduce drift, and shortens the loop response time after the second equalizing pulse interval for maximum correction.

46895825, Aug 25, 1987

Oct 27, 1986

6/923640

Alvin R. Balaban - Lebanon NJ
Steven A. Steckler - Clark NJ

RCA Corporation - Princeton NJ

H04N 506

331 20

A digital phase-lock-loop circuit includes a generator that produces a horizontal rate output signal at a controlled frequency and a phase detector responsive to the output signal and to an incoming synchronizing signal. The phase detector is coupled to the generator control port via a loop filter. When the phase between the output signal and the synchronizing signal that synchronizes the phase-lock-loop circuit changes as a result of, for example, head switching in a two-head VTR that supplies the synchronizing signal, a signal representative of such phase change is produced. The phase change representative signal is fed forward to the generator, by bypassing the loop filter of the phase-lock-loop circuit. The phase change representative signal produces an immediate phase shift of the output signal such that the loop filter is not affected by the head switching.

44713266, Sep 11, 1984

Apr 30, 1981

6/259359

Steven A. Steckler - Clark NJ
Alvin R. Balaban - Lebanon NJ

RCA Corporation - New York NY

H03K 3282

331111

A circuit for supplying first and second currents to a load comprises two current generators for providing those currents during first and second time intervals and a resistance through which those currents flow. Two control potentials developed by two semiconductor junctions are applied across the resistance. First and second control circuits control the two current generators so that the first and second currents are provided during the first and second time intervals, respectively. The current supply circuit is useful in a multivibrator wherein the timing capacitor thereof is the load to which the first and second currents are supplied.

42272173, Oct 7, 1980

Feb 26, 1979

6/015205

Alvin R. Balaban - Lebanon NJ
Steven A. Steckler - Clark NJ

RCA Corporation - New York NY

H04N 550

3581921

A channel number display arrangement for a television receiver includes a multiplexer for alternately coupling binary signals representing the tens and units digits of the channel number of a selected channel to a single decoder and driver arrangement. To reduce visible effects of switching transients, the switching operation of the multiplexer is synchronized with respect to the receiver's deflection signals so that switching transients occur during horizontal retrace intervals in which the receiver's electron beams are normally blanked. In addition, keyed AGC circuitry, normally activated during the horizontal retrace intervals, is inhibited during the switching operation so that it is not erroneously set up in response to switching transients.

44569220, Jun 26, 1984

Aug 4, 1982

6/405171

Alvin R. Balaban - Lebanon NJ
Steven A. Steckler - Clark NJ

RCA Corporation - New York NY

H04N 9535

358 31

Comb filter arrangements are provided for separating frequency interleaved signal components of a video signal. A video signal is sampled at a rate which satisfies the Nyquist criterion for the bandwidth of the signal, and the resultant signal samples are applied to a bandpass filter. The bandpass filter produces a filtered signal restricted to a portion of the original video band. The filtered signal is subsampled at a rate which satisfies the Nyquist criterion for the information of the restricted passband, producing replicas of the restricted passband beginning approximately at zero Hertz and extending upward in frequency about frequencies which are multiples of the subsampling frequency and its harmonics. The subsampled information in the replicated passbands is comb filtered, and the comb filtered signals are interpolated up to the original sampling rate of the video signal. The comb filtered and interpolated signals are applied to a second bandpass filter exhibiting substantially the same passband as the first bandpass filter.

46368361, Jan 13, 1987

Dec 3, 1984

6/677524

Steven A. Steckler - Clark NJ
Alvin R. Balaban - Lebanon NJ

RCA Corporation - Princeton NJ

H04N 945

358 19

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.