Thomas I Chen

US Patent:

45463891, Oct 8, 1985

Filed:

Jan 3, 1984

Appl. No.:

6/567524

Inventors:

Walter G. Gibson - Princeton NJ
Michael A. Plotnick - Southampton PA
Thomas Y. Chen - Flemington NJ

Assignee:

RCA Corporation - Princeton NJ

International Classification:

H04N 5781

US Classification:

358342

Abstract:

Video disc track numbers are conveyed during each video line by means of a quadrature phase shift keyed data carrier recorded along with the picture and sound carriers on a video disc. Upon playback, the data sequence is processed to identify tracking errors occurring within each video field to thereby enable immediate correction of disc tracking errors on a line-by-line basis thus minimizing picture and sound interruption caused by intra-field tracking errors.

US Patent:

40645347, Dec 20, 1977

Filed:

Apr 20, 1976

Appl. No.:

5/678467

Inventors:

Tung Chang Chen - Villanova PA
Thomas M. Chen - Doylestown PA

Assignee:

Leone International Sales Corporation - Bridgeton NJ

International Classification:

250
H04N 718

US Classification:

358107

Abstract:

The present system provides a means to record an image of an item which is extremely difficult to inspect because of its peculiar shape or because the person who is inspecting it cannot come in close proximity thereto, such as red hot glass being measured for form and size immediately upon being formed into a bottle. The present system employs a television camera and logic circuitry to electronically compare the profile of said image against a standard item whereby the item being inspected or measured can either be rejected or accepted.

US Patent:

44778414, Oct 16, 1984

Filed:

Oct 6, 1981

Appl. No.:

6/309192

Inventors:

Thomas Y. Chen - East Brunswick NJ
Walter G. Gibson - Princeton NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04N 576

US Classification:

358335

Abstract:

A filter limits the bandwidth of a caption video signal in a video disc player to minimize color beats when the caption signal is displayed along with a picture video signal on a television receiver. The filter delay, which would otherwise cause offset between the caption and an associated background signal used to enhance visibility of the caption, is compensated for by extending the time duration of each occurrence of the background signal by a multiple of the filter delay.

US Patent:

39378985, Feb 10, 1976

Filed:

Jul 18, 1974

Appl. No.:

5/489574

Inventors:

Anthony Frank Presto - Nutley NJ
James Grant Dunn - Upper Montclair NJ
Thomas Chungmin Chen - West Caldwell NJ

Assignee:

International Telephone and Telegraph Corporation - Nutley NJ

International Classification:

H04M 356
H04Q 1104

US Classification:

179 18BC

Abstract:

There is disclosed a digital conference bridge for a delta modulated switching system having information transmitted by delta modulation bits in M channels of a time division multiplex frame, where M is an integer greater than three. N conferees, where N is an integer greater than two but less than M, are interconnected by a time switch to enable a conference to take place among the conferees. N three stage shift registers are provided, one for the delta modulation bits of each of the conferees. N sequence detectors are coupled to an associated one of the shift registers to produce a binary 1 output when bits stored in the shift register are all binary 1 or all binary 0. N counters each have their count increased by the binary 1 output of an associated one of the sequence detectors. A count comparator is coupled in common to all the counters and produces a control signal indicating a new speaker for the counter having the largest count. A selection matrix is coupled to each shift register and responds to the control signal to couple the delta modulation data of the new speaker through a one stage memory to the time switch for distribution to all of the conferees.

US Patent:

45875707, May 6, 1986

Filed:

Sep 12, 1983

Appl. No.:

6/531243

Inventors:

Thomas Y. Chen - Flemington NJ
Jon K. Clemens - Skillman NJ
Victor Auerbach - Hamilton Sq. NJ

Assignee:

RCA Corporation - Princeton NJ

International Classification:

H04N 576
G11B 2108

US Classification:

358342

Abstract:

A video disc record system having a stylus for recovering information effects kicks which induce limited stylus translations across a disc record surface. Control circuitry responsive to a desired stylus translation are coupled to kicker means for inducing the stylus translation. Actual stylus translations are used to calibrate the kicker activation signals to minimize the kick used to induce stylus translations thereby reducing damage to the disc surface incurred during a stylus translation.