Telecommunication terminal able to modify the voice transmitted during a telephone call
First Claim
Patent Images
1. A telecommunication terminal comprising:
- a receiver configured to receive an analog speech signal representing speech of a user of the terminal;
an analog to digital converter configured to convert the analog speech signal into a digital signal;
a coding and extracting unit configured to extract a plurality of reconstruction parameters from the digital signal, the reconstruction parameters including log area ratio coefficients, a fundamental frequency and a pulse excitation signal;
an interface configured to receive an instruction to modify at least one of the reconstruction parameters and, responsive to receiving the instruction, to control a source coder and modifying unit to modify at least one of the reconstruction parameters by a particular amount; and
a transmitter configured to transmit the digital signal including the modified reconstruction parameters external to the telecommunication terminal so that a voice associated with the transmitted digital signal has at least one characteristic different from the speech represented by the analog speech signal.
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Abstract
A telecommunication terminal receives an analog speech signal from a user of the terminal and converts the analog speech signal into a digital signal. A vocoder applies source coding to the speech signal and extracts reconstruction parameters from the speech signal. The reconstruction parameters are modified so that the transmitted voice associated with the signal is modified.
18 Citations
11 Claims
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1. A telecommunication terminal comprising:
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a receiver configured to receive an analog speech signal representing speech of a user of the terminal; an analog to digital converter configured to convert the analog speech signal into a digital signal; a coding and extracting unit configured to extract a plurality of reconstruction parameters from the digital signal, the reconstruction parameters including log area ratio coefficients, a fundamental frequency and a pulse excitation signal; an interface configured to receive an instruction to modify at least one of the reconstruction parameters and, responsive to receiving the instruction, to control a source coder and modifying unit to modify at least one of the reconstruction parameters by a particular amount; and a transmitter configured to transmit the digital signal including the modified reconstruction parameters external to the telecommunication terminal so that a voice associated with the transmitted digital signal has at least one characteristic different from the speech represented by the analog speech signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification