This paper presents an image transmission control mechanism which – in contrast to existing systems – adapts dynamically to the capabilities of the client display as well as to the available transmission bandwidth. This mechanism is based on existing image compression algorithms whose strengths and weaknesses are summarised. For JPEG image compression, the predictability of the compression rati...

Representing image files as simple arrays of pixels is generally very inefficient in terms of memory. Storage space and network bandwidth is limited so it is necessary to compress image files. There are many methods that achieve very high compression ratios by allowing the data to be corrupted in ways that are not easily perceivable to the human eye. A new concept is described, combining fracta...

We demonstrate a novel pulse-compression technique that uses the self-confinement of two-dimensional spatial solitons propagating in bulk nonlinear media to increase the spectral bandwidth followed by a grating pair for recompression. Output pulses of 19-fs duration with 0.6-,J energies are routinely obtained at a repetition rate of 8.6 kHz. Unlike other high-energy compression methods, soliton...

Image compression is process to remove the redundant information from the image so that only essential information are stored the storage size, transmission bandwidth and transmission time. In this paper comparative analysis of gray scale image compression is done by three different methods that are Daubechies Transform, Haar Transform and Biorthogonal Transform. Experimental results demonstrat...

We compare the performance of video compression algorithms in terms of compression ratio, video distortion and computation time in order to study the feasibility of a real time software videophone for 64 kbits/s channels, with exible user deened compression methods. We can combine and adjust the compression algorithms to the required bandwidth and video quality. We introduce the double logarith...

– To enable wireless Internet and other data services using mobile appliances, there is a critical need to support contentrich cellular data communication, including voice, text, image and video. However, mobile communication of multimedia content has several bottlenecks, including limited bandwidth of cellular networks, channel noise, and battery constraints of the appliances. In this paper, w...

As Internet Telephony unveils a communication system that allows for the conduction and reception of voice signals and data over the internet network, the volume of voice traffic and (or) packets on IP networks have grown substantially. However, a crucial problem imminent is that of inefficient bandwidth utilization which is mostly as a result of header overheads resulting from the attachment o...

The convergence of mobile technologies will characterize the future telecommunication systems based on TCP/IP protocols. These Protocols can be used to build both wired and wireless parts on same platform. But TCP/IP headers overheads are large, so it utilizes more bandwidth even small services, whose payload is small. So it definitely need header compression to save bandwidth, as we know bandw...

This paper presents the digital data compression of multimedia transmission system. Digital audio compression is a scheme, which allows efficient storage and transmission of audio data. The main objective of this research is to show the program in MATLAB for Moving Pictures Expert Group (MPEG-1) audio encoder and decoder for layer-1, which will be analyzed in future on Digital Signal Processing...

Geometry compression is an effective way to distribute high-volume geometry data within limited bandwidth and storage capacity. In this paper, a new time-varying 3D geometry compression method based on 4D lifted wavelet transform is presented. In this hybrid approach, geometric information and animation are compressed based volume grid values. Isosurfaces are reconstructed from decompressed gri...