Abstract
A system and method for providing improved adaptive multi-rate wideband (AMR-WB) discontinuous transmission (DTX) synchronization. According to various embodiments an indication on the start of the inactive speech period is signalled to the decoder via a voice activity detection (VAD) flag a predetermined number of frames before the DTX period will start i.e. before the SID_FIRST frame is received. When the VAD flag indicates active speech or when the VAD flag has been set to zero less than the predetermined number of frames ago the received NO_DATA frame can be classified with a high degree of reliability as active speech i.e. considered as transmitter network or terminal-initiated signalling and can be substituted by a SPEECH_LOST frame. When the VAD flag was set to zero eight frames ago or earlier the NO_DATA frame is classified as DTX.
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| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
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| 5G,4G,3G,2G | 14/09/2018 | ISLD-201809-321 | NOKIA CORP | Yes | Basis Patent | ||||
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