Abstract: To synchronize a decoder at the receiving end, particularly an MPEG audio decoder, with the corresponding coder operating at the transmitting end, it is proposed to supply the data decoded by the decoder to a FIFO memory, the output clock rate at which the data are read out or output from the FIFO memory, being adjusted as a function of the loading level of the FIFO memory.

Abstract: A decoder and decoding method is disclosed for real time decompression of coded picture-, video- and film information. The decoder provides an efficient implementation of the functions requiring an optimized processor comprising one multiplier having a minimized chip area. The process of decoding, frame reconstruction, block to raster conversion and color space conversion are combined using concurrent processing and resource sharing techniques. The processes IQ, IDCT, FR and optional CSC use one specialized processor comprising only one multiplier and further elements having no multiplier. The processor comprises process controls which are independent of each other for controlling the decompression.

Abstract: A circuit and method for reading code words having variable lengths out of memory used for data words having a fixed length. In the circuit and method, two shifting operations are separated from each other in dimension and time. The first shifting operation is performed using a combination of multiplexers and buffers that does not include a barrel shifter. The circuit and method are especially suitable for use in the decompression of data when transmitting multimedia information, such as information based on H.261, JPEG and MPEG standards.