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Efficient VQ techniques and general noise shaping in noise feedback coding

This paper describes new efficient Vector Quantization (VQ) techniques that enable low complexity implementations of VQbased Noise Feedback Coding (NFC). These methods offer mathematical equivalence to higher complexity methods. Furthermore, the paper presents efficient codec structures for general noise shaping as used in BroadVoice®16 – a new SCTE® (Society of Cable Telecommunications Engineers) and PacketCableTM speech coding standard for Cable Telephony.