JPS60179798A - Voice recognition equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a speech recognition device.

Conventional configuration and its problems Conventionally, in a speech recognition device, for a feature vector series obtained by analyzing an input speech signal, a plurality of standard patterns are registered in advance as a dictionary in the device. The recognition result is the one closest to this in the row, but in this case, there may be erroneous recognition due to a difference between the utterance level at the time of registering the voice parameters for standard pattern creation and the utterance level at the time of recognition. occurs.

In contrast, conventional speech recognition devices generally display the level of input speech using a level meter, an LED array, or the like.

However, this display method requires the operator to memorize each level meter instruction at the time of registration, and cannot be said to be an effective level matching method.

Purpose of the Invention The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a speech recognition device that can equalize the utterance level at the time of registration and recognition, and improve the recognition rate. do.

Structure of the Invention To achieve the above object, the present invention displays the level of input audio. a display means, a parameter analysis means for analyzing input speech, a storage means for storing parameters analyzed in advance as a standard pattern, parameters of the input speech analyzed by the parameter analysis means, and standard parameters in the storage means. A pattern comparison means calculates the distance between the standard pattern and the standard pattern giving the minimum distance as the recognition result, and a power calculation means calculates the power of each standard pattern when registering the standard pattern. The maximum value and the minimum value or the average value are displayed near the input level display means.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The figure is a block diagram of a speech recognition device according to an embodiment of the present invention. In the figure, 1 is an input signal, 2 is a level display unit that displays the level of the input audio, and 3 is a parameter analysis unit that performs parameter analysis of the input audio and sequentially converts it into a parameter vector sequence. Generally, a converter, linear prediction coefficient type analyzer, etc. are used. 4 is a switch which is switched to the B side when creating a standard pattern and to the A side when comparing patterns. Reference numeral 5 denotes a pattern storage unit that stores the parameter vector sequence created by the parameter analysis unit 3 as a standard pattern.

Reference numeral 6 denotes a pattern comparison section which performs pattern comparison between the standard pattern stored in the pattern storage section 5 and the input cover pattern, and outputs the standard pattern that provides the minimum distance to the signal line 7 as a recognition result. 8 is the power calculation section,
Calculate the average power of each when creating the standard pattern,
Calculate the maximum and minimum values. Reference numeral 9 denotes a range display section that displays the maximum value, minimum value, or average value of the standard pattern average power determined by the power calculation section 8 at a corresponding location on the level display section or in the form of a numerical value.

Next, the operation of the apparatus configured as described above will be explained separately for the time of standard pattern creation and the time of pattern comparison.

First, when creating a standard pattern, the switch 4 is connected to the B side, and the input audio signal is sequentially converted into a string of parameter vectors by the parameter analysis section 3, and then stored in the pattern storage section 5. By repeating this operation, a standard pattern vector sequence is stored in the pattern storage section 5.

Every time a standard pattern is input, the power calculation unit 8 calculates the average power or peak power of the corresponding pattern. When all standard patterns have been stored, the power calculation section 8 outputs the maximum and minimum values of power to the range display section 9, and displays the power range of the standard pattern near the level display section 2.

Next, the case of pattern comparison will be explained.

For pattern comparison, switch 4 is connected to the A side. The parameter analysis section 1 converts the input voice into a parameter vector string as in the case of standard pattern registration.The analyzed input parameter vector string is input to one input end of the pattern comparison section 6 via the switch 4. be done. The pattern storage unit 5 inputs one of the standard pattern vector sequences to the other input terminal of the pattern comparison unit, and performs distance calculation between the input parameter vector sequence and the standard pattern vector sequence. The above operation is performed for all standard patterns in the pattern storage section 5, and the standard pattern with the minimum distance from the input parameter vector sequence is output to the output signal line 7 as a recognition result.

Prior to the above recognition operation, the range display section 9 displays the level range calculated at the time of creating the standard pattern.

Therefore, when making a speech, the user can easily control his/her speech so that it falls within the level range of the standard pattern while referring to the instructions on the level display section 2.

As described above, according to this embodiment, the range display section 9 is provided near the level display section 2, and the maximum value, minimum value, or average value of the registered standard pattern calculated by the power calculation section 8 is displayed within the range. By displaying this on the display unit 9, it is possible to instruct the speaker to keep the utterance level within the allowable range of the standard pattern during recognition, thereby improving the recognition rate.

In addition, the level display section 2 in the main text. It can also be realized by a range display unit, a nine-digit numeric display, a combination of a meter and an LED, and two light-emitting elements.

Furthermore, although this embodiment has been explained using a registration type recognition device that registers the pattern before use, even if the recognition device is of the type in which the standard pattern is analyzed in advance with a separate device, the power can be calculated at the time of analysis. It can be applied by

As the power in the power calculation section 8, there is a method of using the power of the vowel stationary part in addition to the average power and the peak power.

Further, in this embodiment, the operation can be performed programmatically using a computer and a display.

Effects of the Invention As described above, the speech recognition device of the present invention includes display means for displaying the input 1/bell of the input voice as well as display means for displaying the maximum value, minimum value, or average value of the power of the standard pattern. By providing this, it is possible to improve the recognition rate by giving instructions to the speaker to keep fluctuations in the speaker's utterance level within an allowable range, and this has great industrial value.

[Brief explanation of the drawing]

The figure is a block diagram of a speech recognition device in a practical example of the present invention. 2: Level display section, 3: Parameter analysis section, 4: Switch, 5: Pattern storage section, 6: Pattern comparison section , 8...
... Power calculation section, 9... Range display section.

Claims (3)

[Claims] (1) Level display means for displaying the level of input audio;
A speech recognition device comprising: power calculation means for calculating the average power of the input speech when registering it as a standard pattern; and range display means for displaying the maximum value, minimum value, or average value of the power calculation means. (2) The speech recognition device according to claim 1, wherein the level display means or the range indication means comprises a plurality of light emitting elements arranged in parallel. (3) The speech recognition device according to claim 1, wherein the power calculation means uses the power of the vowel stationary part as the average power of the corresponding standard pattern.