It is possible to improve the features supported by devices with embedded systems by increasing the processor computing power, but this always results in higher costs, complexity, and power consumption. An interesting alternative is to use the growing networking infrastructures to do remote processing and visualization, with the embedded system mainly responsible for communications and user int...

Voice over IP (VoIP) typically uses the encapsulation voice/RTP/UDP/IP. When MPLS labels are added, this becomes voice/RTP/UDP/IP/MPLS-labels. For an MPLS VPN, the packet header is typically 48 bytes, while the voice payload is often no more than 30 bytes, for example. Header compression can significantly reduce the overhead through various compression mechanisms, such as enhanced compressed RT...

Audio compression is used everywhere – largely due to the rise of the internet, computers, and embedded systems. Since original, uncompressed digital recordings are very large in size, efficient ways are needed to compress large audio signals into small, high-quality, convenient formats. While lossy audio formats, like MP3, are widely popular in many everyday applications, lossless formats are ...

Image compression has been an important research topic for many years. There are many kinds of compression techniques, but most of these do not fully take advantage of the characteristics of a target application. An example is virtual conferencing, one of the most popular applications in multimedia, which demands a huge network bandwidth. The paper presents an application-speci c image compress...

| Sequences of digital video images typically require vast amounts of electronic memory for storage, and occupy much bandwidth during transmission. Widely used image and video compression standards, such as JPEG and MPEG, use the two-dimensional Discrete Cosine Transform (DCT) to achieve near-optimal compression of individual frames. This is done by decomposing the the frames into components of...

Advanced imaging requires storage of large quantities of digitized data. Due to the constrained bandwidth and storage capacity, images must be compressed before transmission and storage. However the compression will reduce the image fidelity, especially when the images are compressed at lower bitrates. The reconstructed images suffer from blocking artifacts and the image quality will be severel...

This document describes a method to improve the bandwidth utilization of RTP streams over network paths that carry multiple Real-time Transport Protocol (RTP) streams in parallel between two endpoints, as in voice trunking. The method combines standard protocols that provide compression, multiplexing, and tunneling over a network path for the purpose of reducing the bandwidth used when multiple...

This document describes a method to improve the bandwidth utilization of RTP streams over network paths that carry multiple Real-time Transport Protocol (RTP) streams in parallel between two endpoints, as in voice trunking. The method combines standard protocols that provide compression, multiplexing, and tunneling over a network path for the purpose of reducing the bandwidth used when multiple...

This work describes a method that makes the Java instruction as small as possible. The proposed method, called "nibble coding", compresses two instructions into one byte. The experiment is carried out to compare Java byte code instruction and a modified code with the nibble coding. The result shows the proposed scheme achieves a much smaller instruction bandwidth than the ordinary byte-code cou...

The design and analysis of robust networking protocols that offer useful performance guarantees requires accurate traffic source models. In this paper we study the problem of characterizing and modeling the arrival process of compressed video. We extend earlier works in this area by including a factor that has previously been ignored, the effect of video capture rate on traffic characterization...