Dual-rate single band communication system
AssigneeBroadcom Corporation
InventorsWilf LeBlanc, Phil Houghton, Kenneth Cheung
Life of this patent
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Abstract
A system, method, and apparatus for a multiple data rate communication system is presented herein. The communication system receives data samples that are either sampled at a narrowband rate or a wideband rate and provides various functions and services, such as echo cancellation, DTMF detection and generation, and call discrimination. For wideband signals, a down-sampled signal is provided for each of the foregoing function and service. The output of the function or services is then recombined with the wideband signal.
Claims57
A method for providing signal processing functions to a signal, said method comprising:
- receiving digital samples of the signal, wherein the digital samples are sampled at a first sampling rate;
- downsampling the received digital samples to a second sampling rate with a downsampler;
- processing the downsampled digital samples, the processing comprising detecting presence of a particular type of signal, wherein the particular type of signal is a signal having particular spectral characteristics;
- and
- combining a signal indicating presence of the detected signal with the received digital samples.
A system for providing signal processing functions to a signal, said system comprising:
- at least one interface for receiving digital samples of the signal, wherein the digital samples are sampled at a first sampling rate;
- a downsampler for downsampling the received digital samples to a second sampling rate;
- a function module for processing the downsampled digital samples, the processing comprising detecting presence of a particular type of signal, wherein the particular type of signal is a signal having particular spectral characteristics;
- a combiner for combining a signal indicating presence of the detected signal with the received digital samples, wherein combining comprises adding;
- an encoder for packetizing the combined processed samples;
- and
- the at least one interface transmitting the combined processed samples.
An article of manufacture for processing a signal, said article of manufacture comprising a computer readable medium, said computer readable medium storing a plurality of instructions, wherein, when executed by a processor, the plurality of instructions comprise instructions directing the processor for:
- receiving digital samples of the signal, wherein the digital samples are sampled at a first sampling rate;
- downsampling the received digital samples to a second sampling rate;
- processing the downsampled digital samples, the processing comprising detecting presence of a particular type of signal, wherein the particular type of signal is a signal having particular spectral characteristics;
- and
- combining a signal indicating presence of the detected signal with the received digital samples.
A method for providing signal processing functions to a signal, said method comprising:
- receiving digital samples of the signal, wherein the digital samples are sampled at a first sampling rate;
- downsampling the received digital samples to a second sampling rate with a downsampler;
- processing the downsampled digital samples;
- combining the processed digital samples with the received digital samples;
- downsampling the combined digital samples to the second sampling rate;
- processing the downsampled combined digital samples;
- and
- combining the processed downsampled combined digital samples with the combined digital samples.
A system for providing signal processing functions to a signal, said system comprising:
- an interface for receiving digital samples of the signal, wherein the digital samples are sampled at a first sampling rate;
- a downsampler for downsampling the received digital samples to a second sampling rate;
- a function module for processing the downsampled digital samples;
- a combiner for combining the processed digital samples with the received digital samples;
- another downsampler for downsampling the combined digital samples to the second sampling rate;
- another function module for processing the downsampled combined digital samples;
- and
- another combiner for combining the processed downsampled combined digital samples with the combined digital samples.
An article of manufacture for processing a signal, said article of manufacture comprising a computer readable medium, said computer readable medium storing a plurality of instructions, wherein, when executed by a processor, the plurality of instructions comprise instructions directing the processor for:
- receiving digital samples of the signal, wherein the digital samples are sampled at a first sampling rate;
- downsampling the received digital samples to a second sampling rate;
- processing the downsampled digital samples;
- combining the processed digital samples with the received digital samples;
- downsampling the combined digital samples to the second sampling rate;
- processing the downsampled combined digital samples;
- and
- combining the processed downsampled combined digital samples with the combined digital samples.
One or more circuits for processing a signal, the one or more circuits comprising:
- at least one processor arranged to receive digital samples of the signal, wherein the digital samples are sampled at a first sampling rate, the at least one processor operable to, at least:
- downsample the received digital samples to a second sampling rate;
- process the downsampled digital samples, the processing comprising detecting presence of a particular type of signal, wherein the particular type of signal is a signal having particular spectral characteristics;
- and
- combine a signal indicating presence of the detected signal with the received digital samples.
Dependencies are inferred from the claim text.