Can a VHS store anamorf widescreen?

[Cornucopia]

No, analog does NOT have samples. It is continuous sinusoidal signal.

Scott

[Bwaak]

No, analog does NOT have samples. It is continuous sinusoidal signal.

Sure, it is continuous signal with individual periods representing elements. More elements - more frequency.

[Cornucopia]

Individual periods?

[Bwaak]

Period: the interval of time between events, so the period is the reciprocal of the frequency.

[dellsam34]

I will test it on Saturday.

Any chance doing some tests?

[Sharc]

I will test it on Saturday.

Any chance doing some tests?

You are late, guys. The proof has been provided here by Alwyn:
https://forum.videohelp.com/threads/407467-Vhs-capture-advice/page12#post2682241

So yes, the 720x576 is 4:3 i.e. SAR=16:15 in that case of his PAL HDV Camcorder, means ignoring the DVCAM/Rec.601 specs.

[johns0]

vhs-d supports wide screen.

[dellsam34]

Period: the interval of time between events, so the period is the reciprocal of the frequency.

Correct, Since Luma, chroma and HiFi audio are modulated into frequencies way higher than them, However when the signal gets demodulate and filtered out by connecting all those periods tips together the resulting signal is a continuous smooth representation of chroma, luma and audio.

[Sharc]

Analog video has samples, each wave period represents two samples.... ..

Not quite (or I misread).
Analog video does not "have samples".
Analog video is a continuous waveform over time and amplitude. No quantization, no samples.
When converting an analog video signal to digital one has to sample the analog signal with a sampling frequency which is at least 2x its spectral bandwidth (frequency domain) of the analog signal. For video the sampling frequency for the luma has been standardized to 13.5 MHz (Rec.601), and the spectrum of the analog video signal has to be lowpass- or bandpass filtered (i.e. bandwidth limited) accordingly before being sampled in order to prevent aliasing. (The sampling frequency for the chroma can be "subsampled"=sampled at a lower frequency or decimated according to the different standards.)
From the sampling process we get time-discrete analog samples, quantized in time, spaced in time 1/13.5MHz=~74ns apart, which can now be quantized in amplitude and converted to bits by means of an analog-to-digital converter. From here onwards we have the bitstream which can be further processed in digital form.

Anyway, it's going off topic.

[SF01]

I will test it on Saturday.

Any chance doing some tests?

You are late, guys. The proof has been provided here by Alwyn:
https://forum.videohelp.com/threads/407467-Vhs-capture-advice/page12#post2682241

So yes, the 720x576 is 4:3 i.e. SAR=16:15 in that case of his PAL HDV Camcorder, means ignoring the DVCAM/Rec.601 specs.

He was shooting DV mode, DV shoots all 720 pixels while still being REC.601 compliant, so while transmitting the image it will not out of the blue crop the 16 additional pixels on sides and substitute them with black when outputting analog video and converter will convert them back into digital. Looking at the wheel it is clearly visible that it's not a perfect circle.

Apologies for not doing the tests, I am occupied with a priority project that I need to finish quickly, I will try to run some tests on this weekend with analog, digital and test board signals.

[Sharc]

He was shooting DV mode, DV shoots all 720 pixels while still being REC.601 compliant ....

No, I would have to disagree, it's not Rec.601. And it's not Rec.601 plus filling the picture to 720.
Proof 1 is given in post#357
The wheel becomes an exact circle only when playing the full 720x576 frame as 4:3, which means it is not Rec.601.

Looking at the wheel it is clearly visible that it's not a perfect circle.

Of course it is not a circle when you view it as stored. But this doesn't mean it is Rec.601 compliant.
Proof 2: For Rec.601 the SAR would have to be 12:11 (in very close approximation of Rec.601) for PAL. But in fact it is 16:15 (sometimes called "generic") as has been shown by doing the circle test in post#358. So again it is not Rec.601 compliant.

[SF01]

He was shooting DV mode, DV shoots all 720 pixels while still being REC.601 compliant ....

No, I would have to disagree, it's not Rec.601. And it's not Rec.601 plus filling the picture to 720.
Proof 1 is given in post#357
The wheel becomes an exact circle only when playing the full 720x576 frame as 4:3, which means it is not Rec.601.

Looking at the wheel it is clearly visible that it's not a perfect circle.

Of course it is not a circle when you view it as stored. But this doesn't mean it is Rec.601 compliant.
Proof 2: For Rec.601 the SAR would have to be 12:11 (in very close approximation of Rec.601) for PAL. But in fact it is 16:15 (sometimes called "generic") as has been shown by doing the circle test in post#358. So again it is not Rec.601 compliant.

Right, it is not expanded. However DV itself as produced by native DV camcorder is REC.601 compliant with actually extra image outside regular 4:3/16:9 frame, so that it is REC.470 compatible when output through analog outputs, especially that DV/DVCAM was used by TV stations.
I will have to further test.

If that is indeed the case, then I have unnecessarily cropped edges of video digitized using HDV deck. And yet Vegas and other NLE interpret such video with proper REC.601-compliant SAR...

[dellsam34]

I believed that some newer DV and D8 camcorders did not follow the rec.601 SAR, but some diagreed with me. I would still like to see a test from a strictly DV/D8 imaging sensor and not a one that was designed for anamorphic HD 1440x1080, That would confirm my suspecion about those camcorders.

[Sharc]

However DV itself as produced by native DV camcorder is REC.601 compliant with actually extra image outside regular 4:3/16:9 frame, ....

Yes, adding "extra" image is what a DVCAM/Rec.601 compliant videocam can do. But apparently the HDV Canon of the poster does NOT do it accordingly as the circle test cleary indicated. The HDV Canon ignores Rec.601. It is native 720 rather than 704+filled with extra image. Please do the test with Alywyn's clip.
And yes do the tests with your camara. Make a shot with a wheel, a circular clock or similar. Maybe YOUR camera is Rec.601/DVCAM compliant. We will see.