Voice recording system, recording device, voice analysis device, voice recording method and program
View Patent ↗To provide a method of specifying each of speakers of individual voices, based on recorded voices made by a plurality of speakers, with a simple system configuration, and to provide a system using the method. The system includes: microphones individually provided for each of the speakers; a voice processing unit which gives a unique characteristic to each pair of two-channel voice signals recorded with each of the microphones 10 , by executing different kinds of voice processing on the respective pairs of voice signals, and which mixes the voice signals for each channel; and an analysis unit which performs an analysis according to the unique characteristics, given to the voice signals concerning the respective microphones through the processing by the voice processing unit, and which specifies the speaker for each speech segment of the voice signals.
1. A voice processing method, comprising:
performing a first voice process, a second voice process, and a third voice process by a voice processor realized by a computer on voice signals recorded on a microphone,
wherein the first voice process to inverses one of a plurality of polarities of two-channel voice signals for voice signals obtained through the microphone, and
wherein the second voice process changes one of a plurality of signal powers of the two-channel voice signals for voice signals obtained through the microphone, and
wherein the third voice process delays one of the two-channel voice signals for voice signals obtained through the microphone, and mixes the voice signals per channel;
analyzing mixed two-channel voice signals according to characteristics of the mixed two-channel voice signals;
analyzing a difference of the mixed two-channel voice signals to determine a speaker of the mixed two-channel voice signals;
determining a voice signal in which the first voice process has been applied, and the signal power of the voice signal in a predetermined segment has been increased, and specifying the microphone that recorded said voice signal;
changing one of the signal powers of the mixed two-channel voice signals;
summing the two-channel voice signals to determine the voice signal in the segment as the voice signal in which the second voice process was applied to the integral multiple of the original signal power, for an increase in the signal power of the voice signal in the predetermined segment;
summing the two channel voice signals after correcting a delay by the voice processing unit on one of the mixed two channel voice signals;
determining that the second voice process was applied to the voice signal in the segment after the signal power of the voice signal in the predetermined segment is increased to the integral multiple of the original signal power; and
determining that at least one of a plurality of microphones have recorded the voice signal.
2. The voice processing method according claim 1 , wherein the voice processor further records the voice signals subjected to the voice processing on a predetermined recording medium; and the voice recorded on the predetermined recording medium is reproduced and analyzed, and a speaker is specified.