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920 Basil M. Kasasbeh, Rafa E. Al-Qutaish, Muzhir S. Al-Ani and Khalid Al-Sarayreh system. The best form of reduction that referred to new mobile technology is to reduce the size by a factor of 4. This can be implemented by two level of compression to generate a new image size of 265*256 as shown in Figure 5. 0 1 2 3 . . . . . 1023 7.4. Frame Format 0 1 2 3 . . . . . . . . . .1023 Figure 5: Image compression. 0 1 2 . . 511 Level_1 compression 0 1 2 . . . . 511 0 1 . 255 Level_2 compression 0 1 . .255 The suggested frame format shown in Figure 6 consists of the following fields : • Start Frame (SF), 2 bytes length. • -*Identification Source Address (ISA), 2 bytes length. • Identification Destination Address (IDA), 2 bytes length. • Identification Function Frame (IFF), 2 bytes length, identifies the purpose of frame. • User Data Frame (UDF), 64*3 kbytes length. • End Frame (EF), 2 bytes length. S F 7.5. Rate Specification I S A I D A Figure 6: Frame format structure. I F F 2 2 2 2 192 k 2 Bytes The frame length is 16 bytes of synchronization and identification and 64*3 bytes for data. The 64 kbytes comes from 256*256 pixels image size. So the total frame length is 1536128 bits. Acceptable live TV must be transmitted at least 25 frame per second. The permitted bit rate in this case is 38.403200 Mbps. U D F E F
Real Digital TV Accessed by Cellular Mobile System 921 7.6. Handover The aim of handover in a Cellular system should not cause a cut-off and keep call in best quality, during the mobility of mobile out of the BTS range or crossing the boundaries of the cell. When a mobile phone access the satellite TV broadcasting, so it must be adapted to any movement of mobile phone as well as the satellite movements. This is done by an Intelligent Supervisory System (ISS) to compare between all the parameters as shown in Figure 7. 7.7. Operation Handover in Satellite System Figure 7: Intelligent Handover. Intelligent Supervisory System Handover in Mobile System The company mobile center installed a many receivers to receive a certain satellites. The next generation mobile unit is built to load and excite TV software. The operation started firstly when a mobile user requesting a specific satellite TV, that is confirmed by MSC company. Secondly the mobile user requesting a specific channel, that is also confirmed by MSC. When all the lows are in order, so the requested service has been in the hand of the mobile user as shown in Figure 8. Satellite Center Figure 8: Transmitting of data. Mobile Center Req. Sat. Req. Ch. Ack. Sat. Ack. Ch. Data Flow Mobile User
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