The DC-DC converter input voltage is used for cell phone jammer

In terms of the current situation applies to cell phones with small memory capacity, 3GPP video format is very easy to send MMS MMS, most of the support for video recording cell phone supports video playback in 3GPP format. In 1998, the founding of the United Nations International Organization for Standardization ISO and the International Electrotechnical Commission IEC MPEG encoding standard. Stands for Moving Pictures Experts Group Chinese translation of the Moving Picture Experts Group. They developed three versions of MPEG, respectively, MPEG1 the MPEG2 MPEG3 which MPEG3 our daily often have access to all of us are familiar with is the MP3. Subsequently the organization to develop the two new image compression standard is as MPEG4 MPEG7. One of working frequency of common cell phone jammer  in the market is 869~894MHz.
MPEG4 is a compression standard for ultra low bit-rate moving images and language. His advantage. MPEG4 compression ratio high, the low bit rate transmission of video. Small compared to MPEG1 the MPEG2 MPEG4 encoder optimized image files, a higher compression ratio, better clarity. Can reach up to 768 * 576 definition, this definition has been close to the DVD picture. We may in this regard is not too concerned about, then talk about the application. MPEG4 compression algorithm Divx video coding technology to the 120-minute movie can be compressed 600MB, you can also compress a DVD to two CD-ROM, so that we do not have to use the DVD device to enjoy DVD-quality images . For the application of mobile video, MPEG4 smaller bandwidth for video transmission. 1900~1990MHz is also contained in the working frequency of cell phone jammer .
The cell phone's hardware can not be compared with the computer, so MPEG4 on the cell phone does not like on a computer so powerful. Many camera cell phones can capture low-resolution MPEG4 video, the same, and now most of the cell phones support download and play MPEG4 video. RM famous Real Networks Inc. to develop audio and video compression specification. RM format all known as Real Media. It contains the file format of the audio stream real audio and video streaming file format real video file. He is a compression format developed by Real Networks Inc., a major for the online real-time transmission of video and audio information in the low rate. The DC-DC converter input voltage is used for cell phone jammer .