Method for forecasting bandwidth expansion frequency band signal and decoding device

Abstract

The embodiment of the invention provides a prediction method and decoding device for a bandwidth expansion frequency band signal. the method comprising: demultiplexing the received bit stream to obtain the frequency domain signal judging whether the frequency domain signal with the highest frequency point of bit allocation is less than the preset bandwidth extension start frequency point of the frequency band; when it is less than the predetermined bandwidth of the excitation signal with a predetermined frequency range in expanding the initial frequency point of frequency band prediction bandwidth expansion band of the excitation signal according to the frequency domain signal or according to frequency domain signal a predetermined excitation signal in the frequency band range preset bandwidth of expanding the initial frequency point of the frequency band and the highest frequency point of bit distribution prediction bandwidth extension band of the excitation signal; The bandwidth of prediction extension band of the excitation signal and bandwidth extension band of the frequency domain envelope prediction bandwidth extension band signal. The technical solution of the invention can effectively ensure the inter prediction of bandwidth extension continuity of band signal excitation signal the guaranteed bandwidth of restoring hearing quality of expanding frequency band signal.

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5G	19/03/2020	ISLD-202003-035	HUAWEI	S1 TS Number: TS 123 501 Version No: Illustrative part: ---- Release: S2 TS Number: TS 123 502 Version No: Illustrative part: ---- Release: +1 -1				Yes	Basis Patent

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WO2014117484A1	4G,3G	23/10/2016	ISLD-201701-002	HUAWEI	S1 TS Number: TS 126 445 Version No: ---- Section No: ---- Release : ---- + -	Yes	Basis Patent
WO2014117484A1	5G	19/03/2020	ISLD-202003-035	HUAWEI	S1 TS Number: TS 123 501 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 502 Version No: ---- Section No: Release : ---- +1 -1	Yes	Family Member
CN103971694A	5G	19/03/2020	ISLD-202003-035	HUAWEI	S1 TS Number: TS 123 501 Version No: ---- Section No: Release : ---- S2 TS Number: TS 123 502 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
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