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
