KR0134452B1 - Apparatus for marking in a song accompany system - Google Patents

Abstract

The present invention relates to a song accompaniment scoring device that accurately scores a song selected by a user, and to solve this problem, a low pass filtering of a voice signal of a user applied through a microphone, and a row for amplifying the filtered signal by a predetermined value Pass filter and amplifier; A switch-capacitive filter for extracting energy of time slot frequency output from the amplifier; A sample and hold unit for sampling and holding a signal output from the switch-capacitive filter; An A / D converter for converting an analog signal output from the sample and hold unit into a digital signal; A first memory for storing energy data of time-phase reference frequencies for the selected songs; A second memory for storing scoring data corresponding to an error value between a user voice signal and a reference signal; Compare the energy data output from the A / D converter with the energy data read out by the first memory, input the error value obtained according to the comparison result into the second memory, and obtain scoring data corresponding to the error value. Microcomputer to control reading; And a post-processing unit for outputting the scoring data output from the microcomputer as audio and video.

Description

Music accompaniment scoring device

Figure is a song accompaniment scoring apparatus for the present invention.

* Description of the symbols for the main parts of the drawings *

1: microphone 2: keypad

10: preprocessor 20: first memory

30: second memory 40: micom

50: post-processing unit

The present invention relates to a song accompaniment scoring apparatus, and more particularly, to a song accompaniment scoring apparatus for scoring a song selected by a user more reliably using a variable filter.

The song accompaniment system is mostly composed of a microphone amplification stage and echo circuit added to the existing video recording and playback system. When the playback mode is controlled by inserting a video tape for recording song accompaniment and music into the video recording and reproducing system, the accompaniment video and music are output and the user sings accordingly.

However, in the song accompaniment system, when applying and scoring the voice energy of the song sung by the user, the sound volume of the user can be reflected, but the frequency of the voice representing the rhythm cannot be expressed, and thus the accurate scoring cannot be performed.

In addition, when the filter bank (Filter Bank) is used, it is easy to obtain energy for each frequency band of the user, but it is expensive in terms of a filter element for subdividing the frequency band. Alternatively, low-performance filters can be bulky and inaccurate, making accurate scoring impossible.

The present invention has been made to solve the above problems, and compares the energy of the time slot frequency with respect to the user's voice signal and the energy of the time slot frequency already stored, and the result of the song sung by the user according to the comparison result The purpose is to provide a song accompaniment scoring apparatus that can accurately score.

In order to achieve the above object, the present invention provides a keypad for selecting a song, a recording medium on which accompaniment images and music are recorded, an audio output terminal for outputting an audio signal output from the recording medium, and audio input from the outside. A song which has a microphone for converting a signal into a form of an electrical signal and outputs the audio signal, and the audio signal output through the audio output terminal and the audio signal applied from the microphone are processed as an audio signal and output to the outside. An accompaniment scoring apparatus comprising: a low pass filter and an amplifier for low pass filtering a user's voice signal applied through a microphone and amplifying the filtered signal by a predetermined value; A switch-capacitive filter for extracting energy of time slot frequency output from the amplifier; A sample and hold unit for sampling and holding a signal output from the switch-capacitive filter; An A / D converter for converting an analog signal output from the sample and hold unit into a digital signal; A first memory for storing energy data of time-phase reference frequencies for the selected songs; A second memory for storing scoring data corresponding to an error value between a user voice signal and a reference signal; Compare the energy data output from the A / D converter with the energy data read out by the first memory, input the error value obtained according to the comparison result into the second memory, and score the data corresponding to the error value. Microcomputer to control reading; And a post-processing unit for outputting the scoring data output from the microcomputer as audio and video.

Hereinafter, the present invention will be described in detail with reference to the illustrated drawings. Figure is a song accompaniment scoring apparatus according to the present invention.

In the figure, a pre-processing unit 10 for processing the user's voice signal applied through the microphone 1 as energy data of the time zone frequency, and the energy data of the time zone reference frequency for the song selected A first memory 20, a second memory 30 storing scoring data corresponding to an error value of a user's voice signal and a reference signal, the energy data output from the preprocessor 10, and the first memory 20. The microcomputer 40 for comparing the energy data read by the memory 20 and controlling the reading of the error value obtained according to the comparison result from the second memory 30 and the grading output from the microcomputer 40. It is composed of a post-processing section 50 for outputting data as audio and video.

In particular, the preprocessing unit 10 low-pass filters the voice signal of the user applied through the microphone 1, and a low pass filter and amplifying unit 12 for amplifying the filtered signal by a predetermined value, and the amplifying unit 12 A switch-capacitive filter (SCF) 14 for extracting energy of time-phase frequency output from the signal, and a sample and hold unit for sampling and holding a signal output from the switch-capacitive filter 14. H, 16, and an A / D converter 18 for converting an analog signal output from the sample and hold section 16 into a digital signal.

The post-processing unit 50 is composed of a voice processing unit 51 for outputting the scoring data output from the microcomputer 40, and an OSD processing unit 52 for text processing the scoring data output from the microcomputer 40 to output. . In addition, the voice processing unit 51 performs low-pass filtering on the D / A converter 511 for converting the digital signal of the scoring data output from the microcomputer 40 into an analog signal and the scoring data output from the D / A converter 511. A low pass filter (LPF, 512) and an amplifier 513 for amplifying the scoring data output from the low-pals filter (512).

An embodiment of the present invention configured as described above will be described in detail.

First, when a user selects a song recorded from a recording medium through the keypad 2, the keypad 2 applies a control signal of the selected song to the microcomputer 40. Accordingly, the accompaniment video and music are reproduced and output from the recording medium (not shown).

At the same time, the user converts the user's voice signal into an electrical signal form through the microphone 1 and transmits the voice signal to the low pass filter and the amplifier 12 of the preprocessor 10.

The low pass filter and amplification unit 12 low-pass filters the voice signal modulated by the electrical signal, and amplifies the filtered signal and then transfers the converted signal to the switch-capacitive filter (SCF) 14.

The switch-capacitive filter 14 extracts the user's voice signal as energy of time slot frequency and transmits the sample signal to the sample and hold unit 16. At this time, it is possible to control the switch-capacitive filter 14 by the control signal of the microcomputer 40 to select a time for extracting the input voice signal, and also via the switch-capacitive filter 14. It may be delivered directly to the sample and hold 16 without.

Thus, the sample and hold unit 16 samples the input signal, holds it, passes it to the A / D converter 18, and the A / D converter 18 converts the digital signal and supplies it to the microcomputer 40. do. The microcomputer 40 receives data output from the A / D converter 18 and simultaneously reads energy data of time-phase reference frequencies of the selected song stored in the first memory 20, and inputs the data. The data is compared.

The control signal corresponding to the error value obtained by the comparison result is provided to the second memory 30. Accordingly, the second memory 30 reads the scoring data corresponding to the error value and transfers the scoring data to the post-processing unit 50 through the microcomputer 40.

The post processor 50 transmits the scoring data output from the microcomputer 40 to the audio processor 51 and the OSD processor 52 for voice and image processing.

The voice processor 51 converts the digital signal of the scoring data into an analog signal by the D / A converter 511 and then transfers the digital signal to the amplifier 513 through the low pass filter 512.

Contrary to the voice signal, the scoring data output from the microcomputer 40 is displayed on the screen by texts through the OSD processor 52. Therefore, the grading obtained by the error value according to the comparison result of the energy of the user's voice signal and the reference voice signal is output as audio and video.

In addition, this invention is not limited to the said Example, A deformation | transformation is possible in the range which does not deviate from the technical summary of this application.

As described above, the present invention compares the energy of the time period frequency of the song selected by the user with the reference frequency energy which is already stored, and obtains a more accurate scoring by obtaining a scoring corresponding to the error value according to the comparison result. There is an advantage to this.

Claims (2)

A song accompaniment scoring apparatus comprising: a low pass filter and an amplifier for low-pass filtering a user's voice signal applied through a microphone and amplifying the filtered signal by a predetermined value; A switch-capacitive filter for extracting energy of time slot frequency output from the amplifier; A sample and hold unit for sampling and holding a signal output from the switch-capacitive filter; An A / D converter for converting an analog signal output from the sample and hold unit into a digital signal; A first memory for storing energy data of time-phase reference frequencies for the selected songs; A second memory for storing scoring data corresponding to an error value between a user voice signal and a reference signal; Compare the energy data output from the A / D converter with the energy data read out by the first memory, input the error value obtained according to the comparison result into the second memory, and score the data corresponding to the error value. Microcomputer to control reading; And a post-processing unit for outputting the scoring data output from the microcomputer as voice and video. The apparatus of claim 2, wherein the post processor comprises: a D / A converter for converting a digital signal of scoring data output from the microcomputer into an analog signal; A low pass filter for performing low pass filtering on the scoring data output from the D / A converter; An amplifying unit for amplifying the scoring data output from the low pass filter and outputting the amplified scoring data; Song accompaniment scoring apparatus comprising a OSD processing unit for outputting the text processing the scoring data output from the microcomputer.