Signal processing
AssigneeDialog Semiconductor GmbH
InventorsNiels Schutten, Wessel Harm Lubberhuizen
Life of this patent
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Abstract
A key word detection apparatus and a method for low-power voice-activated devices are presented. A first signal processing module operates with a first transducer to receive an incoming signal and generates a first sample. A second signal processing module operates with a second transducer which receives an incoming signal and generates a second sample. In summary, a signal processing system, in particular a key word detection system, has a first low power module that wakes up a second higher power module. The second module uses signals from the first module in order to improve accuracy of key word detection or other signal processing tasks.
Claims15
An apparatus for processing electronic signals comprising:
- a first signal processing module configured to operate with a first transducer which receives an incoming signal and generates a first electronic signal comprising a first sample;
- a second signal processing module configured to operate with a second transducer which receives an incoming signal and, when active, generates a second electronic signal comprising a second sample;
- wherein
- the first signal processing module is configured to generate a wakeup signal for activating the second signal processing module and the second transducer upon detection of a triggering event;
- and
- the second signal processing module, when active, is configured to process the first electronic signal comprising the first sample in combination with the second electronic signal comprising the second sample;
- wherein the combination of the first and second samples includes prepending the first sample to the second sample.
A method for keyword detection, the method comprising:
- receiving at a first signal processing module a first electronic signal comprising a first sample generated by a first transducer;
- generating a wakeup signal upon detection by said first signal processing module of a triggering event;
- activating a second signal processing module and a second transducer using the wakeup signal;
- receiving at the second signal processing module said first electronic signal comprising said first sample and a second electronic signal comprising a second sample generated by a second transducer when active;
- and
- processing by said second signal processing module said first electronic signal comprising said first sample in combination with said second electronic signal comprising said second sample
- wherein the combination of the first and second samples includes prepending the first sample to the second sample.
Dependencies are inferred from the claim text.