Acoustic quality evaluation apparatus, acoustic quality evaluation method, and program

Patent metadata

Field	Value
Publication number	US-11699458-B2
Application number	US-201917608808-A
Country	US
Kind code	B2
Filing date	May 7, 2019
Priority date	May 7, 2019
Publication date	Jul 11, 2023
Grant date	Jul 11, 2023

Abstract

To obtain an appropriate evaluation value in an acoustic quality evaluation by a conversational test. An acoustic quality evaluation apparatus 3 evaluates the acoustic quality of a call performed between a near-end terminal 1 and a far-end terminal 2 via a voice communication network 4. An evaluation value presenting unit 31 displays, on a display unit 13, evaluation categories obtained by classifying each of a plurality of evaluation viewpoints into a predetermined number of levels. An input unit 14 transmits the evaluation category selected by the evaluator for each of the evaluation viewpoints, to an evaluation value determination unit 32. The evaluation value determination unit 32 determines the lowest evaluation value among evaluation values assigned to the evaluation category received from the input unit 14 as a subjective evaluation value for acoustic quality.

First claim

The invention claimed is:

1. An acoustic quality evaluation apparatus configured to obtain, from an evaluator, a subjective evaluation value of acoustic quality of a call performed between a plurality of communication terminals, the apparatus comprising:
processing circuitry configured to: execute
an evaluation value presenting processing configured to present, to the evaluator, evaluation categories obtained by classifying a target evaluation viewpoint of a plurality of evaluation viewpoints into a predetermined number of levels; and
an evaluation value determination processing configured to determine a lowest evaluation value among evaluation values assigned to an evaluation category of the evaluation categories selected for each of the plurality of evaluation viewpoints by the evaluator, as the subjective evaluation value of the acoustic quality.

2. The acoustic quality evaluation apparatus according to claim 1 ,
wherein the plurality of evaluation viewpoints include at least easiness to hear a voice of a partner, noise feeling, and return of one's own voice, and
regarding the evaluation categories, a degree of quality in each of the plurality of evaluation viewpoints is classified by five levels, and a higher evaluation value is assigned for higher quality.

3. An acoustic quality evaluation method for obtaining, from an evaluator, a subjective evaluation value of acoustic quality of a call performed between a plurality of communication terminals, the method comprising:
presenting, by an evaluation value presenting processing, to the evaluator, evaluation categories obtained by classifying a target evaluation viewpoint of a plurality of evaluation viewpoints into a predetermined number of levels; and
determining, by an evaluation value determination processing, a lowest evaluation value among evaluation values assigned to an evaluation category of the evaluation categories selected for each of the plurality of evaluation viewpoints by the evaluator, as the subjective evaluation value of the acoustic quality.

4. A non-transitory computer-readable storage medium which stores a program for causing a computer to operate as the acoustic quality evaluation apparatus according to claim 1 .

5. A non-transitory computer-readable storage medium which stores a program for causing a computer to operate as the acoustic quality evaluation apparatus according to claim 2 .

Assignees

• Nippon Telegraph & Telephone

Inventors

• Kurihara Sachiko
• Harada Noboru

Classifications

• G10L25/69 Primary

  for evaluating synthetic or decoded voice signals · CPC title

• G01S15/885

  Meteorological systems · CPC title

• H04M3/2236

  Quality of speech transmission monitoring · CPC title

• H04M1/24

  Arrangements for testing · CPC title

• H04M9/082

  using echo cancellers (echo cancellers per se H04B3/23) · CPC title