Abstract: An audio codec having an encoder and a decoder is disclosed. The encoder enables the compression of an audio signal for transmission or storage while the decoder receives a compressed audio signal for playback. A time scaling module within the decoder allows variation of the playback rate of the compressed audio signal. Further, no significant depreciation in the quality of pitch occurs as a result of varying the playback rate. The codec features a control for independently varying the playback rate and a module for delivering pitch compensation. The encoder utilizes a sub-band coding scheme (e.g., MPEG-1 and MPEG-2) wherein an audio signal is split into at least two frequency sub-bands for compression. Using a filter bank having two filters, for example, the audio signal is split into the frequency sub-bands. An decoder having a time scaling module is further disclosed. The time scaling module time stretches or compresses an audio signal as desired using a synchronized overlap and add (SOLA) algorithm.

Abstract: An integrated circuit providing selectable power supply lines for isolating defects manifested by unusual quiescent current levels. During normal operation, a unitary power supply line provides power to different sections of the integrated circuit. In accordance with the present invention, the unitary power supply line is decoupled from the sections of the integrated circuit and power is provided by the selectable power supply lines during failure analysis of the integrated circuit. A section of interest of the integrated circuit is first placed in a static test state in which defects in the section may produce unusual quiescent current levels. A selectable power supply line for providing power only to the specified section of the integrated circuit is the activated by an enable signal provided to a switch coupled to the selectable power supply line. The switch allows for decoupling of the unitary power supply line from the selectable power supply line.