Erik Tor Berg

US Patent:

7277860, Oct 2, 2007

Filed:

Feb 23, 2004

Appl. No.:

10/784690

Inventors:

Hosahalli Srinivas - Irvine CA, US
Gopal Venkatesan - Aliso Viejo CA, US
Erik Berg - Laguna Beach CA, US
Amy Hundhausen - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

G10L 21/00

US Classification:

704500, 704501

Abstract:

An integrated digital BTSC encoder substantially implemented on a single CMOS integrated circuit is described. By saturating and adding offsets to the value of the feedback control signal in regions of operation where the calculation for the control signal is dominated by noise, an integrated circuit selectively adjusts the control signal for the spectral or wideband feedback loop, as required, so that the performance of a very low noise digital BTSC encoder complies with the requirements of the BTSC standard.

US Patent:

7463310, Dec 9, 2008

Filed:

Feb 23, 2004

Appl. No.:

10/784760

Inventors:

Erik Berg - Laguna Beach CA, US
Gopal Venkatesan - Aliso Viejo CA, US
Hosahalli Srinivas - Irvine CA, US
Amy Hundhausen - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 7/08
H04H 20/47

US Classification:

348484, 348485, 381 2

Abstract:

An integrated digital BTSC encoder with an improved pilot signal generator substantially implemented on a single CMOS integrated circuit is described. By digitally generating a sinusoid that is frequency locked to a two-state input reference signal using a high rate internal clock, a hardware-efficient BTSC pilot signal generator is provided with good acquisition and tracking performance. Implemented efficiently as a simple phase detector, a low-complexity loop filter, a pilot frequency offset adder, a phase accumulator and a sinusoidal generator, the invention enables lower-rate post-processing of the pilot tone without a costly variable interpolator decimator structures.

US Patent:

7532728, May 12, 2009

Filed:

Feb 23, 2004

Appl. No.:

10/784574

Inventors:

Gopal Venkatesan - Aliso Viejo CA, US
Amy Hundhausen - Laguna Beach CA, US
Hosahalli Srinivas - Irvine CA, US
Erik Berg - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04R 5/00

US Classification:

381 23, 381106, 381108, 348484, 348738, 704501

Abstract:

An BTSC encoder with an improved digital filter structure substantially implemented on a single CMOS integrated circuit is described. By cascading first and second order allpass filter structures to form a higher order digital filter, such as a Cauer low pass filter, limit cycle oscillations are reduced or eliminated, word-length growth from one stage to the next is contained, and a more efficient overall filter structure and performance is obtained.

US Patent:

7557862, Jul 7, 2009

Filed:

Feb 23, 2004

Appl. No.:

10/784863

Inventors:

Amy Hundhausen - Laguna Beach CA, US
Hosahalli Srinivas - Irvine CA, US
Gopal Venkatesan - Aliso Viejo CA, US
Erik Berg - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 7/08
H04H 5/00

US Classification:

348485, 381 3

Abstract:

An integrated digital BTSC encoder is implemented on a single CMOS integrated circuit chip with an all digital RF modulator. A set top box is provided that allows for a fully integrated solution which may be used with legacy television systems and also with other audio/visual equipment connected to the set top box.

US Patent:

7750975, Jul 6, 2010

Filed:

Nov 12, 2008

Appl. No.:

12/269140

Inventors:

Erik Berg - Laguna Beach CA, US
Gopal Triplicane Venkatesan - Aliso Viejo CA, US
Hosahalli Srinivas - Irvine CA, US
Amy Hundhausen - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 7/08
H04H 20/47

US Classification:

348484, 348485, 381 2

Abstract:

An integrated digital BTSC encoder with an improved pilot signal generator substantially implemented on a single CMOS integrated circuit. By digitally generating a sinusoid that is frequency locked to a two-state input reference signal using a high rate internal clock, a hardware-efficient BTSC pilot signal generator is provided with good acquisition and tracking performance. Implemented efficiently as a simple phase detector, a low-complexity loop filter, a pilot frequency offset adder, a phase accumulator and a sinusoidal generator, the invention enables lower-rate post-processing of the pilot tone without a costly variable interpolator decimator structures.

US Patent:

7847864, Dec 7, 2010

Filed:

Feb 21, 2003

Appl. No.:

10/372427

Inventors:

Steven Jaffe - Irvine CA, US
Tracy C. Denk - Aliso Viejo CA, US
Erik Berg - Laguna Beach CA, US
Amy Hundhausen - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 5/40

US Classification:

348724

Abstract:

All digital RF modulator. An RF modulator, implemented using only digital techniques, obviates the need for an additional board, implemented using discrete analog components, to perform the necessary modulation to provide the RF output signal for use with a display device (television). Modern displays typically include functionality to support a number of input types beyond an RF input. However, older, legacy displays typically only support inputs that are RF in nature. A fully integrated solution that performs the RF modulation of the output signal that may be used in such legacy types systems is provided using digital techniques.