VIDEO 8-HI FORMAT (IEC60B(Sec)191)
The high band version of Video 8 retains the same footprint on tape, with embedded track finding and following, and a down-converted chroma sub-carrier. Significantly higher luminance frequencies are recorded on tape with almost double the frequency deviation of Video 8, yielding increased resolution and reduced chrominance-luminance cross-talk. There are no longitudinal tracks but an option records time code on the helical tracks between the video and PCM audio data.
| Signal system | ||
| Analogue, composite video, FM and PCM audio. | ||
| Scanner | ||
| Geometry | Helical | |
| No. of rotating heads | 2 | |
| Scanner diameter | 40 | mm |
| Rotation speed | 25 | rev/s |
| Tracks/revolution | 2 | |
| Head-to-tape speed | 3.12 | m/s |
| Video track angle | 4.91 | degree |
| Track width | 34.4 | µm |
| Track pitch | 34.4 | µm |
| Azimuth | ±10 | degree |
| Tape Properties | ||
| Coercivityf | 1500 approx | Oe |
| Type | Metal particle or1050 approx ME | |
| Width | 8.00 | mm |
| Thickness (total] | 10 (ME&MP) | µm |
| Tape Consumption | ||
| Linear | 83.88 | mm/s |
| Areal | 0.064 | m²/min |
| Shelfvolume | 89 | cm³/h |
| Electrical Characteristics | ||
| Sync tip carrier frequency | 5.7 | MHz |
| Peak white | 7.7 | MHz |
| Chroma s/c | 0.732 ** | MHz |
| Shortest wavelength | 0.4 | µm |
* Tape magnetic properties are not stated in the standard; suitability is ascertained
by comparison with reference tapes.
** Strictly 46.875fh. Track 1 has phase continuous chroma s/c, track 2 has phase retarded
90° at every horizontal interval.
IEC60B(Sec)191
