A speech coding for a full-band speech analysis/synthesis system is described. In this work, full-band speech is defined as speech with a sampling frequency above 40 kHz, whose Nyquist frequency covers the audible frequency range. In prior works, speech coding has generally focused on the narrowband speech with a sampling frequency below 16 kHz. On the other hand, statistical parametric speech ...

In a high mobility environment, single-carrier (SC) space-frequency block coding (STBC) diversity achieves better bit error rate (BER) performance than SC space-time block coding (STBC) diversity. However, in a strong frequency-selective fading channel, the BER performance degrades due to the orthogonality distortion of SFBC codeword. In this paper, we propose a frequency-domain equalization (c...

The omega neuron 1 (ON1) of the cricket Teleogryllus oceanicus responds to conspecific signals (4.5 kHz) and to the ultrasonic echolocation sounds used by hunting, insectivorous bats. These signals differ in temporal structure as well as in carrier frequency. We show that ON1's temporal coding properties vary with carrier frequency, allowing it to encode both of these behaviorally important sig...

In recent years, there has been increased interest in spacefrequency-time (SFT) coding methodology to achieve high data rates over wideband mobile channels. This exploits bandwidth efficiency of multiple transmit and receive antennas, orthogonal frequency division multiplexing (OFDM) modulation, timeand frequency-selectivity offered by high speed radio channel. In this paper we compare through ...

This paper proposes a tonal component coding algorithm for a codec that employs a transform followed by Hu man coding, such as MPEG-2 Audio NBC (Non-Backward Compatible)[1]. After the input audio signal is mapped onto a frequency domain, the proposed algorithm withdraws local maximum components that degrade coding e ciency. By this withdrawal, the atness of the spectrum increases and the e cien...

Spike-frequency adaptation causes reduced spiking during prolonged stimulation, but the full impact of adaptation on neural coding is far more complex, especially if one takes into account the diversity of biophysical mechanisms mediating adaptation and the different ways in which neural information can be encoded. Here, we show that adaptation has opposite effects depending on the neural codin...

A novel technique for the perceptual coding of spatial audio is presented. This coding technique allows individualized 3D audio presentation and exploits the dichotomous roles of the lowfrequency interaural timing and level difference cues versus the high-frequency spectral cues in human sound localization. The high-frequency spectral cues are modified to match the acoustics of the listener’s o...

A transform coding method for coding higher layers of a multi-layer embedded speech and audio coding system using factorial pulse codebook is proposed. The proposed methods use frequency selective attenuation of lower layer output to reduce the spurious noise generated when speech model based coding method is used in lower layers for coding of the nonspeech signals. The frequency selective atte...

The discrete wavelet transform (DWT) has been widely used in scalable video coding for its advantages in multi-resolution analysis and subband decomposition. In this paper, a spatially scalable video coding system based on H.264 coding method and in-band overcomplete discrete wavelet transform (ODWT) technique is proposed, which integrates the good compression performance of H.264 in low freque...