Signal processor, method of signal processing and computer program
First Claim
Patent Images
1. A signal processor comprising:
- a conversion unit sampling at a frequency and also digitizing at the frequency an analog signal related to a value of a physical quantity and outputting, at the frequency, a resulting digitized measured value of the physical quantity;
a comparison unit comparing the outputted measured value of the physical quantity digitized by said conversion unit with a reference value of the physical quantity; and
an announcement unit announcing information based on the result of comparison obtained from said comparison unit at the frequency,wherein said comparison unit compares, at the frequency, the measured value of the physical quantity digitized by said conversion unit with said reference value of the physical quantity, every time the sampling takes place, in synchronization with the sampling.
1 Assignment
0 Petitions
Accused Products
Abstract
A CPU generates the reference value (root mean squared value) of sound level and outputs it to a DSP, the DSP generates a measured value of sound level (root mean squared value), and compares thus-generated measured value of sound level (root mean squared value) with the reference value (root mean squared value) of sound level received from the CPU, and outputs a signal expressing the result of comparison to a display device, to thereby enable comparison of the measured value of sound level (root mean squared value) with the reference value (root mean squared value) of sound level, every time the sampling takes place in synchronization with the sampling frequency in the A/D converter.
6 Citations
11 Claims
-
1. A signal processor comprising:
-
a conversion unit sampling at a frequency and also digitizing at the frequency an analog signal related to a value of a physical quantity and outputting, at the frequency, a resulting digitized measured value of the physical quantity; a comparison unit comparing the outputted measured value of the physical quantity digitized by said conversion unit with a reference value of the physical quantity; and an announcement unit announcing information based on the result of comparison obtained from said comparison unit at the frequency, wherein said comparison unit compares, at the frequency, the measured value of the physical quantity digitized by said conversion unit with said reference value of the physical quantity, every time the sampling takes place, in synchronization with the sampling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of signal processing comprising:
-
a conversion step sampling at a frequency and also digitizing at the frequency an analog signal related to a value of a physical quantity and outputting, at the frequency, a resulting digitized measured value of the physical quantity; using a comparison unit for comparing the outputted measured value of the physical quantity digitized in said conversion step with a reference value of the physical quantity; and an announcement step announcing information based on the result of comparison obtained from said comparison unit at the frequency, wherein said comparison unit compares, at the frequency, the measured value of the physical quantity digitized in said conversion step with said reference value of the physical quantity, every time the sampling takes place, in synchronization with the sampling.
-
-
11. A computer program embedded in a computer readable medium or computer memory which allows the computer to execute:
-
a conversion step sampling at a frequency and also digitizing at the frequency an analog signal related to a value of a physical quantity and outputting, at the frequency, a resulting digitized measured value of the physical quantity; using a comparison unit for comparing the outputted measured value of the physical quantity digitized in said conversion step with a reference value of the physical quantity; and an announcement step announcing information based on the result of comparison obtained from said comparison unit at the frequency, wherein said comparison unit compare, at the frequency, the measured value of the physical quantity digitized in said conversion step with said reference value of the physical quantity, every time the sampling takes place, in synchronization with the sampling.
-
Specification