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Frequency band extending apparatus, player apparatus, and playing method

A technology of frequency band extension and frequency band, which is applied to frequency band extension devices and playback devices and fields, and can solve problems such as noise cancellation and loss

Inactive Publication Date: 2011-11-02
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deletion of the high-band signal leads to problems such as loss of "realness" and muting otherwise provided by the original signal

Method used

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  • Frequency band extending apparatus, player apparatus, and playing method
  • Frequency band extending apparatus, player apparatus, and playing method
  • Frequency band extending apparatus, player apparatus, and playing method

Examples

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Embodiment Construction

[0029] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. These embodiments are capable of playing input signals with higher audio quality.

[0030] figure 1 is a block diagram showing the configuration of the band extension device 10 according to the embodiment. The band extension device 10 includes an extension control unit 11 , a band division unit 12 , a time classification unit 13 , an envelope estimation unit 14 , a band interpolation unit 15 , a high frequency generation unit 16 , a phase adjustment unit 17 , and a band synthesis unit 18 .

[0031] Auxiliary information (for example, type of coding system, sampling rate, and bit rate) related to the input signal is supplied to the extension control section 11, and the extension control section 11 determines an extension start frequency band based on the auxiliary information, and starts the determined extension The frequency band is supp...

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Abstract

A player apparatus for playing an input signal after band-extending the input signal includes: an extension controller to determine an extension start band for the input signal in accordance with information relating to the input signal; and a band divider to divide the input signal into a plurality of sub-band signals. The frequency band is extended on the basis of a plurality of the sub-band signals on a side lower than the extension start band, among the plurality of sub-band signals into which the input signal is band-divided by the band divider.

Description

[0001] Cross References to Related Applications [0002] The present application contains subject matter related to Japanese Patent Applications JP 2006-304501 filed in the Japan Patent Office on Nov. 9, 2006 and JP 2007-274091 filed on Oct. 22, 2007, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a frequency band extension device, a frequency band extension method, a playback device, a playback method, a program for causing a computer to perform reproduction processing, and a recording medium having the program recorded thereon, all of which can play back audio files in the high-frequency band with higher sound quality. The encoded data after which it is encoded. Background technique [0004] In recent years, music distribution services that provide encoded data such as MP3 (International Standard ISO / IEC 11172-3, MPEG Audio Layer 3) have become increasingly popular. In most of these services, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00G10L21/00G10L21/02G10L21/04G11B20/18G10L21/0388G10L21/057
CPCG10L19/24G10L21/038
Inventor 光藤祐基知念徹本间弘幸牧野坚一
Owner SONY CORP