Translation guide
Refers to digital television and radio broadcasting transmitted from ground-based towers, as opposed to satellite or cable. In Japan, this is commonly associated with 地上デジタル放送 (terrestrial digital TV broadcasting) and its abbreviated forms.
The standard term for over-the-air digital television broadcasting in Japan, often used in official contexts or when specifying the type of broadcast.
The full, formal term for terrestrial digital broadcasting, primarily referring to TV. Used in official documents, news, and technical contexts.
日本では2011年に地上デジタル放送に完全移行しました。
Japan completed the full transition to terrestrial digital broadcasting in 2011.
The most common abbreviation for 地上デジタル放送, used in everyday conversation, advertising, and casual writing. Refers specifically to digital terrestrial TV.
地デジ対応のテレビを買わないと、もうすぐ見られなくなるよ。
If you don't buy a TV that supports terrestrial digital broadcasting, you won't be able to watch soon.
A slightly shortened form of 地上デジタル放送, often used in compound nouns or when the context is clear.
地上デジタルのチャンネル数は地域によって異なります。
The number of terrestrial digital channels varies by region.
When specifically referring to digital radio transmitted from ground-based towers, as opposed to TV.
The full term for terrestrial digital radio broadcasting. Less common than TV-related terms, but used in technical or official contexts.
地上デジタルラジオ放送は、音質がクリアでノイズが少ないです。
Terrestrial digital radio broadcasting has clear sound quality with little noise.
Common abbreviation for digital radio in general, but can refer to terrestrial digital radio when context implies it. Often used in consumer electronics.
このラジオはデジタルラジオに対応しています。
This radio supports digital radio.
When you need to refer to the entire category of terrestrial digital broadcasting, encompassing both TV and radio, in a technical or regulatory context.
Explicitly includes both TV and radio. Used when clarity is needed, but it's verbose. Often seen in legal or technical documents.
地上デジタル放送（テレビ・ラジオを含む）の普及率は年々上昇しています。
The penetration rate of terrestrial digital broadcasting (including TV and radio) is increasing year by year.
In most everyday situations, 'terrestrial digital broadcasting' refers to digital TV. Use 地デジ or 地上デジタル放送 unless radio is specifically mentioned.
Terrestrial digital broadcasting (地上デジタル放送) is distinct from satellite broadcasting (衛星放送, BS/CS) and cable TV (ケーブルテレビ). Make sure the context is clear.