| … | |
… | |
| 38 | NICAM728_PAL_BGH |
38 | NICAM728_PAL_BGH |
| 39 | NICAM728_PAL_I |
39 | NICAM728_PAL_I |
| 40 | |
40 | |
| 41 | NICAM 728 32-kHz, 14-bit digital stereo audio is transmitted in 1ms frames |
41 | NICAM 728 32-kHz, 14-bit digital stereo audio is transmitted in 1ms frames |
| 42 | containing 8 bits frame sync, 5 bits control, 11 bits additional data, |
42 | containing 8 bits frame sync, 5 bits control, 11 bits additional data, |
| 43 | and 704 bits audio data. The bit rate is reduced by transmitting only |
43 | and 704 bits audio data. The bit rate is reduced by transmitting only |
| 44 | 10 bits plus parity of each 14 bit sample, the largest sample in a frame |
44 | 10 bits plus parity of each 14 bit sample, the largest sample in a frame |
| 45 | determines which 10 bits are transmitted. The parity bits for audio |
45 | determines which 10 bits are transmitted. The parity bits for audio |
| 46 | samples also specify the scaling factor used for that channel during that |
46 | samples also specify the scaling factor used for that channel during that |
| 47 | frame. The companeded audio data is interleaved to reduce the influence |
47 | frame. The companded audio data is interleaved to reduce the influence |
| 48 | of dropouts and the whole frame except for sync bits is scrambled for |
48 | of dropouts and the whole frame except for sync bits is scrambled for |
| 49 | spectrum shaping. Data is modulated using QPSK, at below following |
49 | spectrum shaping. Data is modulated using QPSK, at below following |
| 50 | subcarrier freqs |
50 | subcarrier freqs |
| 51 | |
51 | |
| 52 | =head1 Broadcast Format by Country |
52 | =head1 Broadcast Format by Country |
| 53 | |
53 | |
| 54 | =over 4 |
54 | =over 4 |
| … | |
… | |
| 117 | Hungary, Zazakhstan, Lithuania, Mongolia, Moldova, Poland, Russia, Slovak |
117 | Hungary, Zazakhstan, Lithuania, Mongolia, Moldova, Poland, Russia, Slovak |
| 118 | Republic, Ukraine, Vietnam |
118 | Republic, Ukraine, Vietnam |
| 119 | |
119 | |
| 120 | =item (G) SECAM |
120 | =item (G) SECAM |
| 121 | |
121 | |
| 122 | Greecem Iran, Iraq, Mali, Mauritus, Morocco, Saudi Arabia |
122 | Greece, Iran, Iraq, Mali, Mauritus, Morocco, Saudi Arabia |
| 123 | |
123 | |
| 124 | =item (K) SECAM |
124 | =item (K) SECAM |
| 125 | |
125 | |
| 126 | Armenia, Azerbaijan, Bulgaria, Estonia, Georgia, Hungary, Kazakhstan, |
126 | Armenia, Azerbaijan, Bulgaria, Estonia, Georgia, Hungary, Kazakhstan, |
| 127 | Lithuania, Madagascar, Moldova, Poland, Russia, Slovak Republic, Ukraine, |
127 | Lithuania, Madagascar, Moldova, Poland, Russia, Slovak Republic, Ukraine, |
