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— This paper describes the low-complexity 14kHz bandwidth audio coding algorithm which has been recently standardized by ITU-T as Recommendation G.722.1 Annex C (" G.722.1C "). The algorithm is an extension to ITU-T Recommendation G.722.1 and a doubled form of the G.722.1 algorithm to permit 14 kHz audio bandwidth using a 32 kHz audio sample rate, at 24,(More)
Expression of a linear current-voltage (I-V) relationship (passive) K(+) membrane conductance is a hallmark of mature hippocampal astrocytes. However, the molecular identifications of the K(+) channels underlying this passive conductance remain unknown. We provide the following evidence supporting significant contribution of the two-pore domain K(+) channel(More)
Accumulating evidence indicates a significant astrocytic involvement in cerebral ischemia neuropathology, but little is known about the immediate astrocytic responses to ischemia insults in terms of electrophysiology and their pathologic implications. We show that astrocytes in acute rat hippocampal slices responded reversibly to more than 30 mins oxygen(More)
This paper describes a new low-complexity full-band (20 kHz) audio coding algorithm which has been recently standardized by ITU-T as Recommendation G.719. The algorithm is designed to provide 20 Hz-20 kHz audio bandwidth using a 48 kHz sample rate, operating at 32-128 kbps. This codec features very high audio quality and low computational complexity and is(More)
OBJECTIVE Most patients with stroke caused by middle cerebral artery occlusion (MCAO) show cognitive deficit that is generally regarded as resulting from damage to the cerebral cortex rather than the hippocampus. Whether MCAO induces hippocampal damage and whether this contributes to the cognitive defects remains unclear. Here we investigate the hippocampal(More)
Astrocytes play a fundamental role in the pathogenesis of ischemic neuronal death. The optimal operation of electrogenic astrocytic transporters and exchangers for some well-defined astrocyte brain homeostatic functions depends on the presence of K+ channels in the cell membranes and the hyperpolarized membrane potential. Our previous study showed that(More)