lity sound. AMR wideband was standardized by 3GPP in 2001. MPEG-4 AAC-LC: the low-complexity version of the Advanced Audio Codec of MPEG-4 provides a range of bit rates and quality levels. The media type is well suited to high-quality audio at bit rates of 64 kbit/s and above. MPEG-4 AAC was standardized by ISO/IEC in 1999. JPEG: the JPEG compression provides lossy compression of typically photographic images with a compression ratio of 4:1 to 30:1 leading to typical mobile compressed file sizes of 5-20 kbytes. JPEG was standardized by ISO/IEC in 1992. GIF: A format for colour raster images that is among the most widely used formats for graphics compression. While GIF87a supports only still images, GIF89a supports simple animation sequences. H.263: the H.263 standard supports video compression for applications, such as video conferencing, video telephony, and video streaming. H.263 aims particularly at video coding for low bit rates (typically 20-30 kbit/s and above). The H.263 baseline was Services approved in 1995, with a new version including the profile and level specifications from 2000. MPEG-4 visual: the simple profile is suited for mobile application scenarios since it is optimized for low bit rate coding and includes coding tools for increased error resilience. There are also other classical standards and standards for VoIP, for example: PCM G.711: the well-known codec used in PSTN networks is the PCM codec G.711. It samples at 8 kHz and codes every sample using 8 bits resulting in a 64 kbps data rate. G.711 is an example of a Waveform codec. GSM codecs: in the European cellular GSM system Vocoder type codecs are used, these are also suitable for voice over IP applications. The data rate is 13 kbps for the GSM Full Rate (FR) codec and 12.2 kbps for the GSM Enhanced Full Rate (EFR) codec. G.723.1 Algebraic CELP. 6.3 and 5.3 kbit/s. 30 ms frames. Algorithmic delay 37.5 msec. (CELP = Code Excited Linear Prediction). G.726 ADPCM (Adaptive Differential PCM). 40, 32, 24, 16 kbit/s. G.728 Low delay CELP. 16 kbi