Parallel signal processing system and method
View Patent ↗A system and method for processing a plurality of channels, for example audio channels, in parallel is provided. For example, a plurality of telephony channels are processed in order to detect and respond to call progress tones. The channels may be processed according to a common transform algorithm. Advantageously, a massively parallel architecture is employed, in which operations on many channels are synchronized, to achieve a high efficiency parallel processing environment. The parallel processor may be situated on a data bus, separate from a main general-purpose processor, or integrated with the processor in a common board or integrated device. All, or a portion of a speech processing algorithm may also be performed in a massively parallel manner.
1. A parallel signal processing system, comprising:
at least one input port configured to receive a plurality of streams of information over time;
a memory configured to store data representing a time period of the plurality of streams of information over time;
a single instruction, multiple data type parallel processor, configured to:
receive the data representing the time period of the plurality of streams of information over time;
process the received data for each respective stream of information over time to produce a result selectively in dependent on at least one of a transform, a convolution, an echo processing and a transversal filtering; and
process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time comprising in-band signal analysis; and
storing the result in the memory.
2. The parallel signal processing system according to claim 1 , wherein the plurality of streams of information over time are independent of each other.
3. The parallel signal processing system according to claim 1 , wherein at least two of the plurality of streams of information over time are related to each other.
4. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to process the received data representing the time period for a respective stream of information over time, dependent on at least one other respective stream of information of the plurality of streams of information over time.
5. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time which is independent of others of the plurality of streams of information over time.
6. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time which comprises a convolution.
7. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time comprising a transversal filtering.
8. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time comprising a time-frequency domain transform.
9. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time comprising a wavelet transform.
10. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time comprising echo processing.
11. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time comprising speech recognition processing.
12. The parallel signal processing system according to claim 1 , wherein the single instruction, multiple data type parallel processor is configured to concurrently execute a common set of instructions for each time period substantially without data-dependent conditional execution branch instructions.
13. A nontransitory computer readable medium, storing therein instructions for controlling a programmable processor to perform a method comprising:
a step for storing data representing a time period of a plurality of streams of information over time in a memory;
a step for controlling a single instruction, multiple data type parallel processor to receive and process the data representing the time period of the plurality of streams of information over time;
a step for controlling the single instruction, multiple data type parallel processor to produce a result selectively in dependent thereon, wherein the process comprises at least one of a transform, a convolution, echo processing and a transversal filtering;
a step for controlling the single instruction, multiple data type parallel processor to process the data representing the time period of the plurality of streams of information over time to produce the result for a respective stream of information over time comprising in-band signal analysis; and
a step for storing the result in the memory.
14. The computer readable medium according to claim 13 , wherein at least one of the plurality of streams of information and the result for each processed streams of information are independent of each other.
15. The computer readable medium according to claim 13 , wherein at least one of the plurality of streams of information over time or at least one of the results are dependent on at least one other of the plurality of streams of information over time or at least one of the results.
16. The computer readable medium according to claim 13 , wherein the result comprises speech recognition processing.
17. A parallel signal processing method comprising:
storing data representing a time period of a plurality of streams of information over time in a memory;
receiving the data representing the time period of the plurality of streams of information over time from the memory;
selectively processing the retrieved data representing the time period of the plurality of streams of information over time with a single instruction, multiple data type parallel processor comprising at least one of a transform, a convolution, echo processing and a transversal filtering;
selectively processing the retrieved data representing the time period of the plurality of streams of information over time with a single instruction, multiple data type parallel processor comprising in-band signal analysis; and
storing the result in the memory.
18. The parallel signal processing method according to claim 17 , wherein said selectively processing comprises performing at least one speech recognition function.
19. The parallel signal processing method according to claim 17 , wherein said selectively processing comprises performing echo processing.
20. The parallel signal processing method according to claim 17 , wherein the in-band signal analysis comprises call progress tone detection.