MULTI-MEDIA NETWORK LAYER PROTOCOLS TO SUPPORT P.C.M. & OTHER COMMUNICATION NETWORKS

THE WAVELET TRANSFORM, BECAUSE OF ITS DILATION PROPERTY, IS THE PREFERRED APPROACH TO PROCESS BROADBAND SIGNALS IN BOTH CIVIL AND MILITARY ENVIRONMENTS. UNFORTUNATELY, ITS COMPUTATION REQUIRES A LARGE AMOUNT OF NUMRICAL OPERATIONS. IN MANY SITUATIONS, THIS MAY BE PROHIBITIVELY EXPENSIVE IF NOT UNREALISTIC FOR ELECTRONIC COMPUTERS. ANALOG PARALLEL PROCESSING TECHNIQUES, INCLUDING OPTICAL METHODS, ARE EITHER NOT SUITABLE OR NOT ACCURATE ENOUGH FOR PRACTICAL APPLICATIONS AND HENCE FOR COMMERCIALIZATION. SWITCHED CAPACITOR TECHNIQUES, WHICH SUBSTITUTE RESISTORS BY APPROPRIATE COMBINATIONS OF HIGH-SPEED SWITCHES AND CAPACITORS, ARE NOW USED IN ACTIVE FILTER DESIGN FOR VLSI IMPLEMENTATION. THE MOST IMPORTANT PROPERTY OF A SWITCHED-CAPACITOR CIRCUIT IS THAT ITS CLOCK FREQUENCY CONTROLS THE FILTER PARAMETERS. RESEARCH IMPLEMENTS THE WAVELET TRANSFORM BY SWITCHED CAPACITOR CIRCUITS. THE DILATION EFFECT IN WAVELET FILTER CAN BE REALIZED BY ADJUSTING THE CLOCK FREQUENCY. BY CURRENT VLSI TECHNIQUE, LARGE NUMBERS OF CHANNEL WAVELET FILTERS CAN BE FABRICATED ON A SINGLE CHIP. THESE IC CHIPS CAN BE USED AS STANDARD COMPONENTS IN SIGNAL PROCESSING UNITS HAVING INCREASED TARGET RESOLUTIONS. IT ALSO OFFERS RELIABLE REAL-TIME PROCESSING AND FULL COMPATIBILITY WITH OTHER STATE-OF-THE-ART ELECTRONIC EQUIPMENTS.