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This paper presents a novel frequency domain bandwidth extension (BWE) scheme with relaxed synchronization, optimized for coding inactive and music/mixed content signals. The algorithm achieves high subjective quality at low and medium bitrates and it has a low algorithmic delay. The algorithm is part of the 3GPP Enhanced Voice Services (EVS) codec. In addition to the presented algorithm, the EVS...
This paper presents high quality monaural superwideband extensions to G.711.1 and G.722, recently standardized as Recommendations ITU-T G.711.1 Annex D and G.722 Annex B. The superwideband (50-14000 Hz) functionality is achieved using embedded scalable structure that adds extension layers on top of the wideband core codecs. The bit rates are extended to 96/112/128 and 64/80/96 kbit/s for G.711.1 and...
Motion information scalability is an important requirement for a fully scalable video codec, a novel and fully scalable motion model (SMM) is proposed to enable a scalable video codec to achieve optimality over a wide range of bit rate, resolution, and frame rate. In SMM, Full search algorithm for motion estimation can find the best matching region in the search area of the reference frame. However,...
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