Edward C Fox

US Patent:

6369857, Apr 9, 2002

Filed:

May 13, 1999

Appl. No.:

09/311252

Inventors:

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

Assignee:

Sarnoff Corporation - Princeton NJ

International Classification:

H04N 546

US Classification:

348555, 348558

Abstract:

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.

US Patent:

41198123, Oct 10, 1978

Filed:

Apr 20, 1977

Appl. No.:

5/789294

Inventors:

Edward Coley Fox - Cranbury NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04B 1500

US Classification:

1791004D

Abstract:

Information processing system, for use with a source of carrier waves modulated with audio information, includes in respective audio channels a demodulator and for recovery of the audio information and track-and-hold amplifiers. Separate circuits are provided for detecting carrier drop-outs and impulse noise occurrences. The output of the detecting circuits is utilized to control the operation of the track-and-hold amplifiers to effect a masking of these occurrences. Signal de-emphasis is accomplished in each channel by means of two separate filters respectively arranged to operate on the input and output signal of the track-and-hold amplifier to minimize noise input to the track-and-hold amplifier.

US Patent:

60467754, Apr 4, 2000

Filed:

Sep 25, 1997

Appl. No.:

8/937826

Inventors:

Krishnamurthy Jonnalagadda - Plainsboro NJ
Liston Abbott - East Windsor NJ
Edward Coley Fox - Cranbury NJ

Assignee:

Sarnoff Corporation - Princeton NJ

International Classification:

H04N 7081

US Classification:

348461

Abstract:

A method and apparatus for recovering an information carrier which has been transmitted as a sub-carrier in the lower VSB spectral region of a television signal. The invention utilizes a spectral inversion method to shift the data carrier frequency from the normal VSB spectral region to a spectral region normally associated with video information in a standard television signal. The data carrier is then recovered using a standard video demodulator and provided to a data utilization circuit, such as a QPSK demodulator.

US Patent:

43002269, Nov 10, 1981

Filed:

Mar 14, 1977

Appl. No.:

5/777477

Inventors:

William E. Barnette - Levittown PA
Edward C. Fox - Cranbury NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04N 576
G11B 2102
G11B 712

US Classification:

369 45

Abstract:

In a capacitance distance sensor apparatus in a focus servo loop for an optical disc playback and record system, stable high servo loop gain and small closed-loop error correction signals are achieved despite surface variations of the disc by compensating for the periodic error command signals generated by the surface variations. A comb filter is provided in the loop tuned to major error component frequencies. The comb filter is formed of a plurality of parallel, bandpass filters that are tuned to frequencies substantially corresponding to the disc rotation frequency and several harmonics thereof. In the distance sensor servo focus control loop, the loop gain can be maintained at a high value to achieve proper beam focus within 0. 5 micron (0. 5. times. 10. sup. -6 meters) for disc surface amplitude variation of three mils (0.

US Patent:

42165024, Aug 5, 1980

Filed:

Aug 18, 1978

Appl. No.:

5/934834

Inventors:

Edward C. Fox - Cranbury NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04N 552

US Classification:

358176

Abstract:

A peak detector circuit is provided for detecting the maximum excursions of an amplitude varying signal. The circuit includes a network comprising a capacitor serially coupled to a charging impedance and having a time constant suitable for responding to the maximum excursions of the amplitude varying signal. A semiconductor means has an input terminal for receiving the amplitude varying signal and an output terminal coupled to the charging impedance for charging the capacitor toward the maximum excursions of the amplitude varying signal. The semiconductor means exhibits an impedance which is subject to increase with a decrease in current drawn therethrough. A controllable current sink is responsive to the amplitude varying signal at the input terminal of the semiconductor means and is coupled to the output terminal of the semiconductor means for drawing a component of current through the semiconductor means during the charging of the capacitor which is supplemental to the capacitor charging current drawn therethrough. The supplemental current component is of a sufficient magnitude to preclude increase of the impedance exhibited by the semiconductor means during the charging of the capacitor beyond a value which is substantially less than the charging impedance.

US Patent:

61813834, Jan 30, 2001

Filed:

May 28, 1997

Appl. No.:

8/864321

Inventors:

Edward C. Fox - Cranbury NJ
Paul Wallace Lyons - New Egypt NJ
Charles Wine - Princeton NJ

Assignee:

Sarnoff Corporation - Princeton NJ

International Classification:

H04N 9475

US Classification:

348515

Abstract:

A method and apparatus for preserving audio and video presentation synchronization during the splicing operation by selectively deleting, if necessary, an audio/video access unit to avoid overlapping of audio/video frames in the spliced output stream.