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Modulation Technique

Bangladeshi TV channels primarily utilize the DVB-T2 standard for digital broadcasting, employing COFDM modulation and occupying 6–8 MHz of bandwidth per channel. Key channels include BTV, which broadcasts via terrestrial and satellite, and several private channels like Jamuna TV, Maasranga TV, Somoy TV, and T Sports, all using DVB-S2 with 8PSK modulation and a standard satellite bandwidth of 36 MHz. The transmission process involves video and audio encoding, multiplexing, modulation, and broadcasting through terrestrial towers or satellites.

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35 views4 pages

Modulation Technique

Bangladeshi TV channels primarily utilize the DVB-T2 standard for digital broadcasting, employing COFDM modulation and occupying 6–8 MHz of bandwidth per channel. Key channels include BTV, which broadcasts via terrestrial and satellite, and several private channels like Jamuna TV, Maasranga TV, Somoy TV, and T Sports, all using DVB-S2 with 8PSK modulation and a standard satellite bandwidth of 36 MHz. The transmission process involves video and audio encoding, multiplexing, modulation, and broadcasting through terrestrial towers or satellites.

Uploaded by

Ahanaf Sami
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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1.

Broadcasting Process of Bangladeshi TV Channels

a. Modulation Technique:

- Bangladeshi digital TV channels mainly use DVB-T2 (Digital Video Broadcasting — Terrestrial 2)
standard.

- The modulation used is usually COFDM (Coded Orthogonal Frequency Division Multiplexing).

- For analog channels (now almost phased out), AM for video and FM for audio was used.

b. Bandwidth:

- Each TV channel typically occupies 6–8 MHz of bandwidth.

- In DVB-T2, multiple channels can be multiplexed into a single transport stream using MPEG-4
compression.

c. Transmission Process:

1. Video & audio encoding (compressed using MPEG).

2. Multiplexing into a transport stream.

3. Modulation using COFDM.

4. UHF band (470–698 MHz) used for transmission via terrestrial towers.

5. Signal is received by antennas or set-top boxes and demodulated for TV display.

Here's an overview of the broadcasting processes, modulation techniques, bandwidths, and


transmission methods for the following Bangladeshi TV channels: BTV, Jamuna TV, Maasranga
TV, Somoy TV, and T Sports.

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�1. Bangladesh Television (BTV)

- Type: State-owned terrestrial and satellite broadcaster

- Modulation:

- Terrestrial: Transitioning from analog to DVB-T (Digital Video Broadcasting — Terrestrial)


using COFDM (Coded Orthogonal Frequency Division Multiplexing) modulation

- Satellite: Utilizes DVB-S2 with 8PSK modulation

- Bandwidth:

- Terrestrial: Typically 6–8 MHz per channel

- Satellite: 15 MHz on AsiaSat-7 and Bangabandhu-1 satellites

- Transmission:

- Terrestrial: Broadcasts via 14 relay stations covering approximately 95% of Bangladesh's


territory and population

- Satellite: Transmits through Bangabandhu-1 and AsiaSat-7 satellites [1]

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�2. Jamuna TV

- Type: Private satellite and cable news channel

- Modulation: Employs DVB-S2 with 8PSK modulation

- Bandwidth: Standard satellite transponder bandwidth of 36 MHz

- Transmission: Broadcasts via satellite, making it accessible both nationally and internationally

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�3. Maasranga Television

---- Type: Private satellite and cable entertainment channel

- Modulation: Uses DVB-S2 with 8PSK modulation

- Bandwidth: Standard satellite transponder bandwidth of 36 MHz

- Transmission: Broadcasts via satellite, reaching audiences across Bangladesh and


internationally [2]

---

�4. Somoy TV

- Type: Private satellite and cable news channel

- Modulation: Utilizes DVB-S2 with 8PSK modulation

- Bandwidth: Standard satellite transponder bandwidth of 36 MHz

- Transmission: Broadcasts via satellite, providing nationwide and international coverage [3]

---

�5. T Sports

- Type: Private satellite sports channel


- Modulation: Employs DVB-S2 with 8PSK modulation

- Bandwidth: Standard satellite transponder bandwidth of 36 MHz

- Transmission: Broadcasts via satellite, making it accessible to viewers across Bangladesh and
beyond

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