sistemas, Systems |
ATSC |
DVB-T |
DVB-T2 |
ISDB-T |
ISDB-Tb |
Modulation Modulación |
8VSB |
OFDM 1/2, 2/3 ,3/4, 5/6 ,7/8 |
Low-density parity-check code+ BCH coding 1/2, 2/3, 3/5, 4,5, 5/6 |
COFDM (BST-OFDM (Segmented structure OFDM - 13 segments 1/2, 2/3, 3/4, 5/6, 7/8 Convolutional Coding + Reed Solomon |
COFDM (BST-OFDM (Segmented structure OFDM - 13 segments
1/2, 2/3, 3/4, 5/6, 7/8 Convolutional Coding + Reed Solomon |
MODES/Modos |
QAM64 (over cable) sobre cable |
QSPK,16QAM,64QAM |
QSPK,16QAM, 64QAM,256QAM |
QPSK, 16QAM, 64QAM, DQPSK ((Hierarchical transmission)) |
QPSK, 16QAM, 64QAM, DQPSK ((Hierarchical transmission)) |
Guard Interval Intervalo de Señal de Guarda |
|
1/4, 1/8, 1/16, 1/32 |
1/4,19/128, 1/8, 19/256, 1/16, 1/32, 1/128 |
1/4, 1/8, 1/16, 1/32 |
1/4, 1/8, 1/16, 1/32 |
FFT SIZE/Tamaño del FFT |
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2K, 8K |
1K,2K,4K,8K,16K,32K |
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Scattered Pilots |
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8% In Total |
1%,2%,4%8% in total |
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Continual pilots |
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2,6% of Total |
0,35% of total |
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Typical data rate (UK) or (USA) |
19,39Mbit/s |
24Mbit/s |
40Mbit/s |
19.94Mbits/S |
14.40Mbits/S |
Max data rate(@20dbC/N) |
|
29Mbit/s |
47,8Mbit/s |
25,7Mbit/s |
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Required C/N ratio (@22Mbit/s) |
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16,7dB |
8,9dB |
20,3dB |
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Interleaving |
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Time, Frequency, bit, byte |
Time, Frequency, bit, byte |
Video Codec |
MPEG2 |
MPEG2-4 |
MPEG 2-4 |
MPEG2 |
MPEG4 AVCHD H264 |
Audio Codec |
ac3 Dolby Digital |
MPEG2 |
MPEG2 |
MPEG2 AAC |
MPEG4 AAC, SBR, HE, LC (Mobile, Movil) |
Band Usage |
VHF2-UHF |
VHF2-UHF |
VHF2-UHF |
VHF2-UHF |
VHF2-UHF |
Bandwidth |
6MHZ |
7-8MHZ |
7-8MHZ |
6MHZ |
6MHZ |
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