specifications of broadcast quality video standard

[[email protected]]

Hi,
I have seen references saying about broadcast quality videos. Does it
denote a specific:
1. resolution
2. bitrate/framerate
3. IBP sequence

Is there some more references available regarding the same on the
web???


Please do help.

TIA.


Jag

[Piergiorgio Sartor]

[email protected] wrote:
> Hi,
> I have seen references saying about broadcast quality videos. Does it
> denote a specific:
> 1. resolution
> 2. bitrate/framerate
> 3. IBP sequence
>
> Is there some more references available regarding the same on the
> web???

Maybe you should be more specific.
For example the IBP sequence refers only to MPEG, not to things
like ITU656 or ITU601 or similar.

bye,

piergiorgio

[Mark]

Try one of the NAB handbooks (for North America info)

(National Association of Broadcasters)

Mark

[glen herrmannsfeldt]

[email protected] wrote:

> I have seen references saying about broadcast quality videos. Does it
> denote a specific:
> 1. resolution
> 2. bitrate/framerate
> 3. IBP sequence

It is about 3.5MHz video bandwidth at 30Hz or 25Hz frame rate.

Note that this is considerably better than standard VHS,
especially at the EP tape speed.

You can convert that to digital resolution values if you want.

-- glen

[Jerry Avins]

glen herrmannsfeldt wrote:
> [email protected] wrote:
>
>> I have seen references saying about broadcast quality videos. Does it
>> denote a specific:
>> 1. resolution
>> 2. bitrate/framerate
>> 3. IBP sequence
>
>
> It is about 3.5MHz video bandwidth at 30Hz or 25Hz frame rate.
>
> Note that this is considerably better than standard VHS,
> especially at the EP tape speed.
>
> You can convert that to digital resolution values if you want.

It's less than broadcast quality, though. That extends to 4 MHz.

Jerry
--
Engineering is the art of making what you want from things you can get.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

[glen herrmannsfeldt]

Jerry Avins wrote:

> glen herrmannsfeldt wrote:

>> [email protected] wrote:

>>> I have seen references saying about broadcast quality videos.
(snip)

>> It is about 3.5MHz video bandwidth at 30Hz or 25Hz frame rate.

>> Note that this is considerably better than standard VHS,
>> especially at the EP tape speed.

>> You can convert that to digital resolution values if you want.

> It's less than broadcast quality, though. That extends to 4 MHz.

Well, I did say "about"...

For monochrome, or with a good comb filter I agree with 4MHz.
Otherwise, you run into the chrominance signal around 3MHz,
so 3.5MHz on average.

As far as I know, VHS is closer to 2MHz, maybe 2.5MHz.
That seems to be good enough for most people.

-- glen