What did EIAJ MTS say to its date? You're tuned in.

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EIAJ MTS is a multichannel television sound standard created by the EIAJ.

Bilingual and stereo sound television programs started being broadcast in Japan in October 1978 using an "FM-FM" system originally developed by the NHK Technical Research Labs during 1962–1969. This system was modified and standardised by the EIAJ in January 1979. Television stations in Japan with capability for bilingual and stereo sound transmissions used the callsign JO**-TAM, where "TAM" denotes their audio FM multiplex sub-carrier designation, until digital switchover to ISDB-T in 2010–2012 which eventually rendered EIAJ MTS obsolete.

The original System M TV standard has a monaural FM transmission at 4.5 MHz. For Japanese multichannel television sound a second channel, or sub-channel, is added to the original signal by using an FM sub-carrier at twice the line frequency (Fh, or 15374 Hz). In order to identify the different modes (mono, stereo, or dual sound) a pilot tone is also added on an AM carrier at 3.5 times the line frequency. The pilot tone frequencies are 982.5 Hz for stereo and 922.5 Hz for dual sound. Contrary to Zweikanalton these pilot tones are not coupled to the line frequency but were instead chosen to allow use of filters already employed in the Pocket Bell pager system.^[1]

References

[edit]

↑ Numaguchi, Yasutaka (December 1979). "Present Status of Multichannel-Sound Television Broadcasting in Japan". IEEE Transactions on Broadcasting. BC-25 (4): 128–136. Bibcode:1979ITB....25..128N. doi:10.1109/TBC.1979.266340. S2CID 19830970.

Video formats

Television

Analog

405 lines	System A
525 lines	System M (Color systems: NTSC, NTSC-J, Clear-Vision, PAL-M) B-MAC
625 lines	System B, C, D, G, H, I, K, L, N (Color systems: PAL, PAL-N, PALplus, SECAM) MAC
819 lines	System E, F
1125 lines	MUSE
1250 lines	HD-MAC
Audio	BTSC (MTS) EIAJ NICAM SAP Sound-in-Syncs Zweikanalton (A2/IGR)
Hidden signals	Captioning CGMS-A EPG GCR PDC Teletext VBI VEIL VIT VITC WSS XDS
Historical	Pre-1940 Mechanical television 180-line 343-line 375-line 441-line 455-line 567-line Field-sequential color system OSKM

Digital

Interlaced	SDTV 480i 576i HDTV 1080i
Progressive	LDTV 1seg 240p 288p EDTV 480p 576p HDTV 720p 1080p UHDTV 4K 8K
MPEG-2 Video	ATSC DVB DVB 3D-TV ISDB DTMB ABS-S
AVS	CMMB
AVS+^{[note 1]}	DTMB ABS-S
MPEG-4 Visual	MobaHo!^{[note 2]}
MPEG-4 AVC	ATSC A/72 CMMB DMB DTMB DVB SBTVD 1seg MobaHo!^{[note 2]}
AVS2^{[note 1]}	ABS-S
MPEG-H HEVC	ATSC 3.0 DVB HD DMB ISDB-S3 DTMB
Audio	AC-3 (5.1) AC-4 DTS DRA MPEG-1 Audio Layer II MPEG Multichannel PCM LPCM AAC HE-AAC MPEG-H 3D Audio
Hidden signals	AFD Broadcast flag Captioning CPCM EPG Teletext
1 2 Also used in China's DVB-S/S2 network. 1 2 Defunct.

Technical issues
14:9 compromise Broadcast-safe Digital cinema (DCI) Display motion blur MPEG transport stream Reverse Standards Conversion Standards conversion Television transmitter Test card Video on demand Video processing Widescreen signaling Templates (Analogue TV Topics)

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See also

References