Patents by Inventor Hosahalli Srinivas
Hosahalli Srinivas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7750975Abstract: 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.Type: GrantFiled: November 12, 2008Date of Patent: July 6, 2010Assignee: Broadcom CorporationInventors: Erik Berg, Gopal Triplicane Venkatesan, Hosahalli Srinivas, Amy Hundhausen
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Patent number: 7557862Abstract: 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.Type: GrantFiled: February 23, 2004Date of Patent: July 7, 2009Assignee: Broadcom CorporationInventors: Amy Hundhausen, Hosahalli Srinivas, Gopal Venkatesan, Erik Berg
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Publication number: 20090129521Abstract: Systems and methods for increasing audio SNR in a NICAM digital sound decoder are provided. One method according to the invention includes receiving a scale factor that indicates a number of bits of a Near Instantaneous Companded Audio Multiplex (NICAM) signal that have been truncated from the signal. The method also includes receiving the NICAM signal itself. The NICAM signal may include a predetermined number of zero bits in place of the predetermined number of truncated bits. The method may also require appending a bit pattern to the NICAM signal that approximates a rounding of the NICAM signal. The bit pattern preferably includes at least one non-zero bit. Another method according to the invention may include selecting a bit pattern from a collection of bit patterns. The collection of bit patterns may include at least non-zero bit.Type: ApplicationFiled: November 21, 2007Publication date: May 21, 2009Applicant: Broadcom CorporationInventors: Mark Core, Hosahalli Srinivas, Fan Xu
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Patent number: 7532728Abstract: 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.Type: GrantFiled: February 23, 2004Date of Patent: May 12, 2009Assignee: Broadcom CorporationInventors: Gopal Venkatesan, Amy Hundhausen, Hosahalli Srinivas, Erik Berg
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Publication number: 20090059069Abstract: 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.Type: ApplicationFiled: November 12, 2008Publication date: March 5, 2009Applicant: BROADCOM CORPORATIONInventors: Erik Berg, Gopal Venkatesan, Hosahalli Srinivas, Amy Hundhausen
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Patent number: 7463310Abstract: 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.Type: GrantFiled: February 23, 2004Date of Patent: December 9, 2008Assignee: Broadcom CorporationInventors: Erik Berg, Gopal Venkatesan, Hosahalli Srinivas, Amy Hundhausen
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Patent number: 7277860Abstract: 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.Type: GrantFiled: February 23, 2004Date of Patent: October 2, 2007Assignee: Broadcom CorporationInventors: Hosahalli Srinivas, Gopal Venkatesan, Erik Berg, Amy Hundhausen
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Publication number: 20050036627Abstract: 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.Type: ApplicationFiled: February 23, 2004Publication date: February 17, 2005Applicant: Broadcom CorporationInventors: Gopal Venkatesan, Amy Hundhausen, Hosahalli Srinivas, Erik Berg
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Publication number: 20050039218Abstract: An integrated digital BTSC encoder substantially implemented on a single CMOS integrated circuit is described. By incorporating a BTSC encoder within an all digital RF modulator, an improved set top box is provided, obviating the need for an additional BTSC encoder and modulator board and/or discrete analog components. A fully integrated solution that performs BTSC encoding within the RF modulator may be used with legacy television systems and also with other audio/visual equipment connected to the set top box.Type: ApplicationFiled: February 23, 2004Publication date: February 17, 2005Applicant: Broadcom CorporationInventors: Amy Hundhausen, Hosahalli Srinivas, Gopal Venkatesan, Erik Berg
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Publication number: 20050038646Abstract: 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.Type: ApplicationFiled: February 23, 2004Publication date: February 17, 2005Applicant: Broadcom CorporationInventors: Erik Berg, Gopal Venkatesan, Hosahalli Srinivas, Amy Hundhausen
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Publication number: 20050038664Abstract: 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.Type: ApplicationFiled: February 23, 2004Publication date: February 17, 2005Applicant: Broadcom CorporationInventors: Hosahalli Srinivas, Gopal Venkatesan, Erik Berg, Amy Hundhausen