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ISDB-T transmits an HDTV channel and a mobile TV channel 1seg within one channel. 1seg is a mobile terrestrial digital audio/video broadcasting service in Japan. Although 1seg is designed for mobile usage, reception is sometimes problematic in moving vehicles.
Japan pioneered HDTV with an analog implementation. The old system is not compatible with the new digital standards. Japanese terrestrial broadcasting of HD via ISDB-T started on December 1, 2003, in the Tokyo, Osaka, and Nagoya metropolitan areas of Japan, and expanded to the outer areas before September 30, 2007. It has been reported that 31 ...
Until around 2021, the vast majority of garakei and carrier-branded Android phones sold in Japan featured support for 1seg. While iOS users have always required to purchase a third-party 1seg antenna separately in order to access 1seg, the rise of 5G NR and unlimited data plans means that 1seg support is gradually becoming less important, hence ...
ISDB supersedes both the NTSC-J analog television system and the previously used MUSE Hi-vision analog HDTV system in Japan. Digital Terrestrial Television Broadcasting (DTTB) services using ISDB-T (ISDB-T International) started in Japan in December 2003, and since then, Japan adopted ISDB over other digital broadcasting standards.
B-CAS cards in a Toshiba Cell Regza set-top box. B-CAS (BS Conditional Access Systems Co., Ltd.) is a vendor and operator of the ISDB CAS system in Japan, largely owned by the public broadcaster NHK with some other electronics companies and broadcasters airing in BSAT.
The 12 GHz band ISDB-S uses PSK modulation, 2.6 GHz band digital sound broadcasting uses CDM and ISDB-T (in VHF and/or UHF band) uses COFDM with PSK/QAM. It was developed in Japan with MPEG-2, and is now used in Brazil with MPEG-4. Unlike other digital broadcast systems, ISDB includes digital rights management to restrict recording of programming.
Digital television in the Philippines uses the Japanese ISDB standards for its terrestrial digital broadcast. On December 31, 2024, all Metro Manila TV stations will shut-off their analog broadcasts according to the National Telecommunications Commission as start of its first phase transition. [297
DTT will coexist with analogue standard television for some time until full deployment of the system on a nationwide level is accomplished. 30 September 2009, decided to employ Japanese ISDB-T system under cooperation with Japan, and officially be agreed with Japan in early October 2009. [155] [156]