This paper proposes two techniques to improve packet loss concealment (PLC). In the first technique, time-warping is used to stretch or shrink the time axis of the signal received in the first good frame after frame loss to align it with the extrapolated signal used to conceal the bad frame. This aligning procedure avoids any destructive interference that might otherwise occur when the two sign...

This paper describes a wideband (7 kHz) speech compression scheme operating at a bit rate of 13.0 kbit/s, i.e. 0.8 bit per sample. We apply a split-band (SB) technique, where the 0-6 kHz band is critically subsampled and coded by an ACELP approach. The high frequency signal components (6-7 kHz) are generated by an improved High-FrequencyResynthesis (HFR) at the decoder such that no additional i...

This paper describes a combined Adaptive Transform Codec (ATC) and Code-Excited Linear Prediction (CELP) algorithm, called ATCELP, for the compression of wideband (7 kHz) signals. The CELP algorithm applies mainly to speech, whereas the ATC mode is selected for music and noise signals. We propose a switching scheme between CELP and ATC mode and describe a frame erasure concealment technique. Su...

A novel low-delay wideband speech coder, called Multiband CELP (MB-CELP), overcomes the major obstacles usually associated with two traditional CELP approaches to wideband speech coding namely fullband CELP and split-band CELP. The new MB-CELP coder employs a multi-band bank of o -line ltered excitation codebooks, fullband linear prediction synthesis, and minimization of the error between origi...

cludes about 130 species worldwide which have been found to be rich sources of new and bioactive steroidal alkaloids. Many species of Fritillaria have traditionally been used as herbal remedies in Japanese, Turkish, Pakistani and Southeast Asian folk medicines. In China, the bulbs of many Fritillaria species (“Beimu” in Chinese) have been used as antitussive and expectorant herbs in traditional...

A aberration, 949 aberrations, 947 absolute pressure, 368, 388 absolute zero, 431, 461 ac current, 711, 722 ac voltage, 711, 722 acceleration, 43, 75, 126, 153 acceleration due to gravity, 62, 75 accommodation, 931, 949 accuracy, 25, 31 acoustic impedance , 615, 620 active transport, 419, 419 activity, 1131, 1140 adaptive optics, 947, 949 adhesive forces, 377, 388 adiabatic, 515 adiabatic proce...

Sun Ick Kim, Moo Geun Jee, Yong Chan Park, Min Hee Won Suk Jang, A Reum Kwon, Bong Jae Seong, and Ka Soon Lee. Journal of the Korean Society Food Science Nutrition 2023;52:722-32. https://doi.org/10.3746/jkfn.2023.52.7.722