Jerrold A Heller, Age 83320 Glaucus St, Encinitas, CA 92024

4608456, Aug 26, 1986

May 27, 1983

6/498824

Woo H. Paik - San Diego CA
Jerrold A. Heller - San Diego CA
Gordon K. Walker - Boxborough MA

M/A-COM Linkabit, Inc. - San Diego CA

H04M 170

179 15S

In the scrambling system, an analog audio signal is converted into a digital signal to provide a sequence of digital signal samples corresponding to the analog audio signal. Each digital signal sample is compressed to provide compressed signal samples having a sign bit, three exponent bits and seven mantissa bits. Each bit of each compressed signal sample is exclusive-OR'd with a unique keystream to thereby scramble the audio signal. A Hamming code generator generates code bits for correcting singular errors in a combination of the sign bit, the exponent bits and the code bits; and a parity bit generator generates a parity bit for detecting double errors in a combination of the sign bit, the exponent bits and the code bits and for further detecting an error in the most significant mantissa bit and/or the parity bit. The bits from a plurality of successive compressed, error-encoded signal samples are interleaved and serialized in order to separate the bits from any single sample by at least a predetermined duration associated with an FM discriminator click. The serialized, interleaved, error-encoded, compressed signal samples are combined to provide two-bit digital words.

4712238, Dec 8, 1987

Jun 8, 1984

6/618917

Klein S. Gilhousen - San Diego CA
Jerrold A. Heller - San Diego CA
Michael Van Harding - San Diego CA
Robert D. Blakeney - Del Mar CA

M/A-COM Government Systems, Inc. - San Diego CA
Cable/Home Communication Corp. - San Diego CA

H04N 7167
H04N 700
H04L 900

380 20

A system in a subscriber television network for enabling descrambling of a received scrambled signal on a prepaid basis and/or an impulse-purchase basis. A received mask signal uniquely related to the scrambled signal is compared with a received authorization signal indicating whether the subscriber is authorized to receive the scrambled signal on a prepaid basis and a prepaid signal for enabling descrambling is provided when the compared signals match. A not-prepaid signal is provided when they do not match. A received cost signal indicating the charge for descrambling the scrambled signal and a received credit signal indicating only the subscriber's accumulated credit are processed with reference to a stored record of the subscriber's prior accumulated charges to determine whether the subscriber has sufficient available credit to pay for descrambling of the scrambled signal. If a program is not prepaid and if sufficient credit is available, the subscriber is given the option of causing the signal to be descrambled on an impulse-purchase basis. To prevent a subscriber from obtaining descrambling through such deceit as changing the mask, authorization, cost and/or credit signals, these signals are processed with key signals which are used in scrambling and descrambling the television signal such that descrambling is prevented if any of the mask authorization, cost and/or credit signals is changed.

4563702, Jan 7, 1986

May 27, 1983

6/498875

Jerrold A. Heller - San Diego CA
Woo H. Paik - San Diego CA

M/A-COM Linkabit, Inc. - San Diego CA

H04N 716
H04L 900

358119

Systems for scrambling and descrambling video information lines. The scrambling system includes a memory; a storage system for sequentially storing groups of four video information lines in the memory; and a retrieval means for forming groups of four scrambled video information lines by retrieving the stored video information from the memory in a sequence different from the sequence within the stored group in which the information was stored. The retrieval system forms the scrambled video information lines by retrieving a portion of a first stored video information line from a first position therein to form a portion of a first scrambled video information line occupying a second position therein; retrieving a portion of the first stored video information line from the corresponding second position therein to form a portion of a second scrambled video information line occupying a position therein other than the corresponding second position; and forming the portion of the first scrambled video information line occupying the corresponding first position therein by retrieving a portion of a stored video information line other than the first stored video information line from a position therein other than the corresponding first position. The sequence of formation of the scrambled lines, the respective sizes of the retrieved portions, and the combinations of stored video lines within the stored groups for forming the first and second scrambled video lines are varied from one group to the next in response to a keystream of control bits. The descrambling system functions conversely to the scrambling system.

6304714, Oct 16, 2001

Nov 26, 1997

8/979145

Edward A. Krause - San Diego CA
Jerrold Heller - Del Mar CA
Adam S. Tom - La Jolla CA
Paul Shen - San Diego CA

Imedia Corporation - San Francisco CA

H04N 576

386 52

An digital home video system providing recording and playback of compressed video programs using an archival storage medium; simultaneous recording and playback using the same archival medium; storage of multiple programs on a single videotape; a full array of trick mode functions; efficient management of the contents of a video tape or other archival storage medium; and real-time random access to video program content, enabling truly interactive playback. These capabilities are provided by combining the best features of an archival storage medium such as digital video tape: namely, potentially large storage capacity, but low tolerance for variable data rate, and essentially linear program access; with the complementary features of a relatively high-access storage device such as a fixed disk drive: namely, tolerance for a highly variable data rate, and random access capability, but relatively lower storage capacity.

4792973, Dec 20, 1988

Dec 4, 1987

7/128889

Klein S. Gilhousen - San Diego CA
Jerrold A. Heller - San Diego CA
Michael V. Harding - San Diego CA
Robert D. Blakeney - Del Mar CA

M/A-COM Government Systems Inc. - San Diego CA
Cable/Home Communication Corporation - San Diego CA

H04N 7167
H04N 700
H04L 900

380 24

A system in a subscriber television network for enabling descrambling of a received scrambled signal on a prepaid basis and/or an impulse-purchase basis. A received mask signal uniquely related to the scrambled signal is compared with a received authorization signal indicating whether the subscriber is authorized to receive the scrambled signal on a prepaid basis and a prepaid signal for enabling descrambling is provided when the compared signals match. A not-prepaid signal is provided when they do not match. A received cost signal indicating the charge for descrambling the scrambled signal and a received credit signal indicating the subscriber's endlessly accumulated credit are processed with reference to a stored record of the subscriber's prior accumulated charges to determine whether the subscriber has sufficient available credit to pay for descrambling of the scrambled signal. If a program is not prepaid and if sufficient credit is available, the subscriber is given the option of causing the signal to be descrambled on an impulse-purchase basis. To prevent a subscriber from obtaining descrambling through such deceit as changing the mask, authorization, cost and/or credit signals, these signals are processed with key signals which are used in scrambling and descrambling the television signal such that descrambling is prevented if any of the mask et al authorization, cost and/or credit signals is changed.

5321725, Jun 14, 1994

Jul 10, 1992

7/908407

Woo H. Paik - Encinitas CA
Scott A. Lery - Leucadia CA
Chris Heegard - Ithaca NY
Edward A. Krause - San Diego CA
Jerrold A. Heller - Del Mar CA

General Instrument Corporation - Hatboro PA

H04L 512

375 39

A method and apparatus for communicating high definition television signals is provided. Video signals are divided into blocks of PCM data. The PCM data is processed using motion estimation and compensation to provide DPCM data. For each block, one of PCM and DPCM data is selected for transmission based on a predetermined criteria. The selected data is compressed using the discrete cosine transform to provide blocks of transform coefficients. The coefficients are quantized to improve their coding efficiency and variable length coded. The variable length coded coefficients are coded using a concatenated coding scheme with a Reed-Solomon outer code and trellis inner code to provide coded signals for transmission. The coded signals are transmitted using QAM.

5057916, Oct 15, 1991

Nov 16, 1990

7/614939

Edward Krause - San Diego CA
Woo H. Paik - Encinitas CA
Vincent C. Liu - San Diego CA
Jerrold A. Heller - Del Mar CA
Paul Shen - San Diego CA
James N. Esserman - San Diego CA

General Instrument Corporation - Hatboro PA

H04N 718
H04N 712

358105

An image area is refreshed during the transmission of a set of motion compensated sequential video images. The video images are divided into a plurality of adjacent regions. The image area is refreshed during a refresh cycle by communicating a different region in each successive video image of the set without motion compensation. Motion compensation of the previously refreshed regions of the image area during the refresh cycle is restricted to an area containing only the previously refreshed regions. Video image data from a current region being refreshed is encoded for use by a decoder in identifying it as non-motion compensated data.

4752953, Jun 21, 1988

Aug 11, 1986

6/895150

Woo H. Paik - San Diego CA
Jerrold A. Heller - San Diego CA
Gordon K. Walker - Boxborough MA

M/A-COM Government Systems, Inc. - San Diego CA
Cable/Home Communication Corp. - San Diego CA

H04L 900

380 9

In a system for scrambling an audio signal for transmission with a video signal having non-video information intervals, an analog audio signal is converted into a scrambled compressed digital audio signal; individual bits from the scrambled compressed digital audio signal are combined to provide 2-bit digital words; each digital word is converted into an 8-bit digital PAM data signal having a binary value bearing a predetermined relationship to the binary value of the converted 2-bit digital word; the 8-bit digital PAM data signal is converted into a 4-level PAM analog signal; and the PAM analog signals are inserted into the non-video information intervals of the video signal for transmission. A descrambling system descrambles the 4-level PAM analog signals by a complementary scheme.