Karaoke system capable of scoring singing of a singer on accompaniment thereof

• US 5,567,162 A
• Filed: 11/04/1994
• Issued: 10/22/1996
• Est. Priority Date: 11/09/1993
• Status: Expired due to Fees

• Current Assignee: Daewoo Electronics (Government of South Korea)
• Original Assignee: Daewoo Electronics (Government of South Korea)
• Inventors: Park, Chan Soo
• Primary Examiner(s): CHENG, JOE H
• Application Number:
  US08/334,113
• Time in Patent Office: 718 Days
• Field of Search: 434/307 R, 434/307 A, 434/308, 434/309, 434/318, 434/365, 84/423 R, 84/454, 84/477 R, 84/601, 84/609, 84/610, 84/611, 84/615, 84/625, 84/645, 395/2.79, 395/154, 360/19.1, 360/33.1, 360/77.01, 348/478, 348/484, 348/571, 348/595, 348/750, 358/310, 358/311, 358/341, 358/342, 358/335
• US Class Current: 434/307.00A
• CPC Class Codes: G09B 15/00 Teaching music metronomes G04F5/02
• CPC Class Codes: G10H 1/361 Recording/reproducing of accompaniment for use with an external source, e.g. karaoke systems
• CPC Class Codes: G10H 2210/091 for performance evaluation, i.e. judging, grading or scoring the musical qualities or faithfulness of a performance, e.g. with respect to pitch, tempo or other timings of a reference performance

Abstract

In a karaoke system capable of scoring a singing of singer on an accompaniment thereof, when a voice signal of the singer is inputted, an energy detector generates a first basic frequency signal with respect to a voice signal section and inputs the first basic frequency signal to a comparator. And then, an audio signal in the voice signal section is inputted to the comparator as a second basic frequency signal. The comparator compares the first and second basic frequency signals with each other and calculates a difference value therebetween, and then inputs it to a microprocessor. The microprocessor outputs a signal for scoring the singing of the singer on the basis of the difference value.

Claims

1. A karaoke system capable of scoring singing of a singer on accompaniment thereof comprising:

a voice signal processing means for generating a first basic frequency signal which is obtained by adopting Fourier Transformation to a voice signal generated by the singer, and outputting a first voltage signal which corresponds to a voice frequency signal existing in a voice signal section of the first basic frequency signal;

an audio signal processing means for generating a second basic frequency signal obtained by adopting Fourier Transformation to an audio signal generated by the karaoke system, and outputting a second voltage signal which corresponds to an audio frequency signal existing in a voice signal section of the second basic frequency signal;

a comparator for comparing the first and second voltage signals respectively inputted from the voice signal processing means and the audio signal processing means so as to output a difference signal therebetween;

an A/D converter for converting the difference signal inputted from the comparator to a digital signal; and

a microprocessor for summing the first and second digital signals continuously inputted thereto in order to output a score display signal calculated on the basis of the sum of the first and second digital signals into a score display device,

wherein the voice signal processing means comprises;

a first low pass filter for filtering the voice signal generated by the singer and generating a first low pass filter signal;

a first frequency signal analyzer for analyzing a frequency of the first low pass filter signal and generating a first frequency analysis signal;

an energy detector for detecting the level of the first low pass filter signal and generating a voice section signal to determine a voice signal section of the first low pass filter signal;

a first basic frequency detector for detecting the first basic frequency signal having a level above a predetermined value in the voice signal section of the first frequency analysis signal;

a first multiplier for multiplying the first basic frequency signal and the voice section signal and generating a first multiplication signal;

a first frequency-voltage converter for converting the first multiplication signal into a first voltage signal corresponding to the first multiplication signal as a first frequency-voltage conversion signal to the comparator, and

wherein the audio signal processing means comprises;

a second low pass filter to filtering the audio signal generated by the karaoke system and generating a second low pass filter signal;

a second frequency signal analyzer for analyzing a frequency of the second low pass filter signal and generating a second frequency analysis signal;

a second basic frequency detector for detecting the second basic frequency signal having a level above a predetermined value in the voice signal section of the second frequency analysis signal;

a second multiplier for multiplying the second basic frequency signal and the voice section signal and generating a second multiplication signal; and

a second frequency-voltage converter for converting the second multiplication signal into a second voltage signal corresponding to the second multiplication signal as a second frequency-voltage conversion signal to the comparator.

2. A karaoke system capable of scoring singing of a singer on accompaniment thereof comprising:

an audio processing means for generating a first basic frequency signal which is obtained by adopting Fourier Transformation to an audio signal voice signal generated by the karaoke system, and outputting a first digital signal which corresponds to an audio frequency signal existing in a region of an audio signal section of the first basic frequency signal;

a voice signal processing means for generating a second basic frequency signal obtained by adopting Fourier Transformation to a voice signal generated by the singer, and outputting a second digital signal existing in the region of the audio signal section of the second basic frequency signal; and

a microprocessor for summing the first and second digital signals continuously inputted thereto respectively from the voice signal processing means and the audio signal processing means to output a score display signal calculated on the basis of the sum of the first and second digital signals to a score display device,

wherein the audio signal processing means comprises;

a first low pass filter for filtering the audio signal generated by the karaoke system and generating a first low pass filter signal;

a first frequency signal analyzer for analyzing a frequency of the first low pass filter signal and generating a first frequency analysis signal;

an energy detector for detecting the level of the first low pass filter signal and generating an audio section signal to determine an audio signal section of the first low pass filter signal;

a first basic frequency detector for detecting the first basic frequency signal having a level above a predetermined value in the audio signal section of the first frequency analysis signal;

a first multiplier for multiplying the first basic frequency signal and the audio section signal and generating a first multiplication signal; and

a first A/D converter for converting the first multiplication signal into a first digital signal corresponding to the first multiplication signal to the microprocessor, and

wherein the voice signal processing means includes;

a second low pass filter to filtering the voice signal generated by the singer to the voice signal processing means and generating a second low pass filter signal;

a second frequency signal analyzer for analyzing a frequency of the second low pass filter signal and generating a second frequency analysis signal;

a second basic frequency detector for detecting the second basic frequency signal, which is the voice signal existing in the audio signal section of the second frequency analysis signal;

a second multiplier for multiplying the second basic frequency signal and the audio section signal inputted thereto from the energy detector of the audio signal processing means and generating a second multiplication signal; and

a second A/D converter for converting the second multiplication signal into a second digital signal corresponding to the second multiplication signal to the microprocessor.