Reference
OpenAI's Answer
In Vietnam, the primary television broadcasting system uses the DVB-T2 (Digital Video Broadcasting — Second Generation Terrestrial) format. This digital broadcasting format was adopted to improve the quality and efficiency of broadcasting. Here's a quick overview:
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DVB-T2/MPEG-4: Vietnam transitioned to the DVB-T2 standard, which provides better picture quality and more efficient use of the radio spectrum. This transition included the integration of MPEG-4, a method of defining compression of audio and visual digital data.
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National Rollout: VTV, the national broadcaster, has deployed DVB-T2 in key cities like Hanoi and Ho Chi Minh City. As of April 2014, television receivers larger than 32 inches were required to support DVB-T2, and by 2015, this requirement extended to smaller screens as well.
For further details, you can look at the source here.
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