Speech and music discriminator for multi-media application

• US 8,340,964 B2
• Filed: 06/10/2010
• Issued: 12/25/2012
• Est. Priority Date: 07/02/2009
• Status: Expired due to Fees

• Current Assignee: Noise Free Wireless Incorporated
• Original Assignee: Alberto D. Berstein, Alon Konchitsky, Don Seferovich, Kevin Fitzgerald, Sandeep Kulakcherla, William Martin Ribble
• Inventors: Konchitsky, Alon, Berstein, Alberto D, Kulakcherla, Sandeep, Ribble, William Martin, Fitzgerald, Kevin, Seferovich, Don
• Primary Examiner(s): Shah, Paras D
• Assistant Examiner(s): Sharma, Neeraj
• Application Number:
  US12/813,350
• Publication Number:
  US 20110029308A1
• Time in Patent Office: 929 Days
• Field of Search: 704/233, 704/226, 704/222, 704/201, 704/223, 704/207
• US Class Current: 704/233
• CPC Class Codes: G10L 25/78 Detection of presence or absence of voice signals switching of direction of transmission by voice frequency in two-way loud-speaking telephone systems H04M9/10

Abstract

The present invention relates to means and methods of classifying speech and music signals in voice communication systems, devices, telephones, and methods, and more specifically, to systems, devices, and methods that automate control when either speech or music is detected over communication links. The present invention provides a novel system and method for monitoring the audio signal, analyze selected audio signal components, compare the results of analysis with a pre-determined threshold value, and classify the audio signal either as speech or music.

Claims

1. A method of manipulating sound signal, the method comprising the steps of:

a) obtaining a buffer of N samples of a sound signal;

b) passing the buffer of N samples through a high pass filter (HPF), with the HPF having a predetermined cut-off frequency in the range of 20 Hz to 800 Hz;

c) finding the power of the buffer of N samples using the equation;

2. The method of claim 1 wherein N is between 512 to 1024 samples.

3. The method of claim 2 wherein N_DEC is between 50 to 100 buffers.

4. The method of claim 3 wherein K, the time index, is between the values of 1 and N, wherein N is in the range of 512 to 1024.

5. The method of claim 4 wherein M, the number of pre-selected frequencies of musical notes is in the range of 12 to 120.

6. The method of claim 5 wherein the pre-selected frequencies of musical notes are in the frequency ranges of 20 Hz to 20,000 Hz.