Music reproducing apparatus

• US 9,230,529 B2
• Filed: 10/14/2014
• Issued: 01/05/2016
• Est. Priority Date: 10/18/2013
• Status: Active Grant

• Current Assignee: ONKYO Corporation (Onkyo Home Entertainment Corp.)
• Original Assignee: ONKYO Corporation (Onkyo Home Entertainment Corp.)
• Inventors: Tachimori, Nobuya
• Primary Examiner(s): WARREN, DAVID S
• Application Number:
  US14/513,700
• Publication Number:
  US 20150107442A1
• Time in Patent Office: 448 Days
• Field of Search: 846/02, 700/94, 704/500
• US Class Current: 1/1
• CPC Class Codes: G10H 2230/015 PDA [personal digital assistant] or palmtop computing devices used for musical purposes, e.g. portable music players, tablet computers, e-readers or smart phones in which mobile telephony functions need not be used touch-screen interfaces G10H2220/096
• CPC Class Codes: G10H 2250/035 Crossfade, i.e. time domain amplitude envelope control of the transition between musical sounds or melodies, obtained for musical purposes, e.g. for ADSR tone generation, articulations, medley, remix audio mixers H04H60/04
• CPC Class Codes: G10H 7/002 using a common processing for different operations or calculations, and a set of microinstructions (programme) to control the sequence thereof
• CPC Class Codes: G10H 7/008 Means for controlling the transition from one tone waveform to another
• CPC Class Codes: G10L 19/00 Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis in musical instruments G10H

Abstract

In a music reproducing apparatus for converting audio data into audio data of different data format so as to reproduce it, gapless reproduction and cross-fade reproduction are performed in a switching manner, and generation of a noise at time of the gapless reproduction is repressed. When a reproducing section performs the gapless reproduction, a converting section performs conversion into PCM data to be reproduced latterly using a buffer used for conversion into the PCM data to be reproduced formerly. Further, when the reproducing section performs the cross-fade reproduction, the converting section generates a buffer different from the buffer used for the conversion into the PCM data to be reproduced formerly in a storage section, and performs the conversion into the PCM data to be reproduced latterly using the generated buffer.

Claims

1. A music reproducing apparatus for performing gapless reproduction for reproducing two audio data sequentially and seamlessly and cross-fade reproduction for reproducing two audio data while performing fade-in and fade-out, the apparatus comprising:

a converting section for generating a buffer in a storage section, and converting first audio data into second audio data of different data format using the generated buffer; and

a reproducing section for performing the gapless reproduction and the cross-fade reproduction on the second audio data, wherein

the converting section

performs conversion into the second audio data to be reproduced latterly using the buffer used for the conversion into the second audio data to be reproduced formerly when the reproducing section performs the gapless reproduction,

generates a buffer different from the buffer used for the conversion into the second audio data to be reproduced formerly in the storage section, and performs the conversion into the second audio data to be produced latterly using the generated buffer when the reproducing section performs the cross-fade reproduction.

2. The music reproducing apparatus according to claim 1, wherein the converting section

stores a sampling frequency of the first audio data converted into the second audio data in the storage section,

when the sampling frequency stored in the storage section is different from the sampling frequency of the first audio data converted into the second audio data, generates a buffer that is different from the buffer used for the conversion into the second audio data to be reproduced formerly in the storage section even in a case where the reproducing section performs the gapless reproduction, and performs the conversion into the second audio data to be reproduced latterly using the generated buffer.

3. The music reproducing apparatus according to claim 1, wherein when the converting section does not perform the conversion into the second audio data to be reproduced formerly, the converting section generates a buffer in the storage section even in the case where the reproducing section performs the gapless reproduction, and performs the conversion into the second audio data to be reproduced latterly using the generated buffer.

4. The music reproducing apparatus according to claim 1, wherein the first audio data is DSD data,

the second audio data is PCM data.

5. A storage medium in which a music reproducing program is stored, the music reproducing program allows a computer to function as a music reproducing apparatus for performing gapless reproduction for reproducing two audio data sequentially and seamlessly and

cross-fade reproduction for reproducing two audio data while performing fade-in and fade-out, the program allowing

the computer to function as:

a converting section for generating a buffer in a storage section, and converting first audio data into second audio data of different data format using the generated buffer; and

a reproducing section for performing the gapless reproduction and the cross-fade reproduction on the second audio data,

the converting section

performs conversion into the second audio data to be reproduced latterly using the buffer used for the conversion into the second audio data to be reproduced formerly when the reproducing section performs the gapless reproduction,

generates a buffer different from the buffer used for the conversion into the second audio data to be reproduced formerly in the storage section, and performs the conversion into the second audio data to be reproduced latterly using the generated buffer when the reproducing section performs the cross-fade reproduction.