AVCHD Acronyms?

Started Feb 24, 2012 | Discussions
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21st Hermit Veteran Member • Posts: 5,463
AVCHD Acronyms?

AVCHD acronyms, what do they mean?
GPH? PSH? GFS? FSH?
FHD = Full HD?

This chart was from a Panasonic ZS20 product page.
--
Lost in the Colorado Mountains!!!

jralbert Senior Member • Posts: 1,008
Re: AVCHD Acronyms?

I think FHD is indeed Full Hi Def. The others remain a mystery to me--
joel albert

FFS Senior Member • Posts: 1,757
Re: AVCHD Acronyms?

21st Hermit wrote:

AVCHD acronyms, what do they mean?
GPH? PSH? GFS? FSH?
FHD = Full HD?

AVCHD: Advanced Video Coding High Definition

All the others acronyms are lost in meaning as they are not explained. They seem to mean differences in video coding, bit rate, screen resolution, interlaced vs progressive, etc..

jrsva New Member • Posts: 9
Re: AVCHD Acronyms?

21st Hermit wrote:

AVCHD acronyms, what do they mean?
GPH? PSH? GFS? FSH?
FHD = Full HD?

FHD does refer to Full HD, meaning 1920 x 1080, in contrast to not-quite-so-high HD, which is 1280 x 720. I'm pretty sure the other 4 acronyms refer in some way to image quality. They ought to be explained somewhere in the Panasonic owner's manual that used them in the table you posted. Greek to me.
--
Best Regards, JRS

Cy Cheze Senior Member • Posts: 2,028
AVCHD Acronyms, according to Cameralabs

Contrary to some light-centric theories, these acronyms are not exactly self-illuminating.

Basically, video at a given bitrate might be in progressive or interlaced form. Or it might be NTSC (60 / 30) or PAL (50 / 25). In some markets, I presume you get NTSC or PAL, but not both.

Don't take my word for it.

Cameralabs:

Set the TZ20 / ZS10 to AVCHD and you have the choice of GFS, FSH, GS and SH quality options. GFS and FSH both record in 1080i, while GS and SH record in 720p; the difference is the GFS and GS modes additionally include GPS location details which are absent on the FSH and SH versions. You may prefer to record AVCHD movies without GPS data to maximise their compatibility.

All four AVCHD modes encode their video at the same rate of 17Mbps. GFS and FSH take a 50 or 60fps output from the sensor (depending on region) and encode 1920x1080 video in a 1080i interlaced format at 50i or 60i respectively. GD and SH take a 50 or 60fps output

jrsva New Member • Posts: 9
Re: AVCHD Acronyms, according to Cameralabs

Good explanation Cy. I'm still curious as to what the acronyms actually stand for . . .
--
Best Regards, JRS

kcphotos New Member • Posts: 7
Re: AVCHD Acronyms?

I wanted to know the same info since I just ordered a Lumix ZS20. Found this table on their online "brochure"

http://panasonic.net/avc/lumix/compact/zs20_tz30/specifications.html

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Sean Nelson
Sean Nelson Forum Pro • Posts: 11,969
Re: AVCHD Acronyms?

Every camera manufacturer comes up with different acronyms to describe their various resolution and bitrate selections. If you look in the manual there may be some indication of what they stand for, but there's no industry-wide standard. And in actual fact it really doesn't matter what the letters stand for - they're just labels which serve as a shorthand for the quality level. The important thing isn't the letters themselves, but the spatial resolution (1080 x 1920 vs 720 x 1280, for example), temporal resolution (24p, 30i, 60p) and bit rate (17Mbit/sec vs. 28Mbit/sec) that the letters correspond to.

KonaBlend New Member • Posts: 5
Re: AVCHD Acronyms?

There is some minor consistency. But then letter-drops come in to do things like keep it at 3-chars or less, or avoid confusing the poor customer by using the letters GPS . Here's a list that is consistent across at least several Panasonic models.

AVCHD
H - high [1280x720, 60p, 13mbps]
FH - full, high [1920x1080, 60i, 13mbps]

SH - super-high [1280x720, 60p, 17mbps]
GS - GPS, super (high) [1280x720, 60p, 17mbps]

FSH - full, super-high [1920x1080, 60i, 17mbps]
GFS - GPS, full, super (high) [1920x1080, 60i, 17mbps]

PSH - progressive, super-high [1920x1080, 60p, 28mbps]
GPH - GPS, progressive, (super) high [1920x1080, 60p, 28mbps]

24H - high [1920x1080, 24p, 24mbps]
24L - low [1920x1080, 24p, 17mbps]

MP4
HD - high-definition [1280x720, 60i, 10mbps]
FHD - full, high-definition [1920x1080, 60i, 20mbps]

TheBitCrusher New Member • Posts: 1
Re: AVCHD Acronyms?

KonaBlend wrote:

AVCHD

PSH - progressive, super-high [1920x1080, 60p, 28mbps]

GPH - GPS, progressive, (super) high [1920x1080, 60p, 28mbps]

So what then is the difference between PSH and GPH as the above just causes a lot of confusion in my eye's.

Sincerely,

TheBitCrusher

pew pew
pew pew Contributing Member • Posts: 775
Re: AVCHD Acronyms?

TheBitCrusher wrote:

KonaBlend wrote:

AVCHD

PSH - progressive, super-high [1920x1080, 60p, 28mbps]

GPH - GPS, progressive, (super) high [1920x1080, 60p, 28mbps]

So what then is the difference between PSH and GPH as the above just causes a lot of confusion in my eye's.

Sincerely,

TheBitCrusher

theres a mistake there, its 60p or 60i (which is interlaced), both with 28mbps and in my experience the 60i gives better image quality, but theres occasions when you need smooth footage where the 60p is a better option.

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lancespring Veteran Member • Posts: 3,933
Why on earth

TheBitCrusher wrote:

KonaBlend wrote:

AVCHD

PSH - progressive, super-high [1920x1080, 60p, 28mbps]

GPH - GPS, progressive, (super) high [1920x1080, 60p, 28mbps]

So what then is the difference between PSH and GPH as the above just causes a lot of confusion in my eye's.

Sincerely,

TheBitCrusher

would you resurrect such an extremely old thread? It is over 2 years old. That model camera that is being discussed is not even being sold anymore. So why would you be interested in info about its specs??

Sean Nelson already gave a very detailed explanation of the situation. Did you not read his reply?
.

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Sean Nelson
Sean Nelson Forum Pro • Posts: 11,969
Re: Why on earth

lancespring wrote:

TheBitCrusher wrote:

KonaBlend wrote:

AVCHD

PSH - progressive, super-high [1920x1080, 60p, 28mbps]

GPH - GPS, progressive, (super) high [1920x1080, 60p, 28mbps]

So what then is the difference between PSH and GPH as the above just causes a lot of confusion in my eye's.

Sincerely,

TheBitCrusher

would you resurrect such an extremely old thread? It is over 2 years old. That model camera that is being discussed is not even being sold anymore. So why would you be interested in info about its specs??

He likely has a newer model camera that uses these same abbreviations and has stumbled across this thread while trying to understand their meaning.  The typo confused him, so he asked the question and got an answer.   Seems perfectly cromulent to me...

lancespring Veteran Member • Posts: 3,933
Re: Why on earth

Sean Nelson wrote:

He likely has a newer model camera that uses these same abbreviations

There is nothing whatsoever in his post to indicate that.   No reference of any kind whatsoever.

All he complains about is his eyes hurting when he read this post here in the forum.   Seems a rather pointless and meaningless comment to me.

And it is the only post that he has ever made on DPREVIEW.

I know that resurrecting the dead is currently popular in some of the new ABC TV shows this season like RESURRECTION and AGENTS OF SHIELD.  But here on DPREVIEW it is often a useless thing to do.

At least that is my opinion of bringing such old threads back to life.

.

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dad_of_four Veteran Member • Posts: 7,921
Re: AVCHD Acronyms?

21st Hermit wrote:

AVCHD acronyms, what do they mean?
GPH? PSH? GFS? FSH?
FHD = Full HD?

Not to be pedantic, but none of those are "Acronyms", they are "Initialisms"
What's the difference?
With Acronyms, we pronounce the Initials as a word
With Initialism, we pronouce the Initials as letters

NASA, LASER, RADAR - Acronyms
IBM, AVCHD, CPU - Initialism

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Sean Nelson
Sean Nelson Forum Pro • Posts: 11,969
Re: AVCHD Acronyms?
1

dad_of_four wrote:

Not to be pedantic, but none of those are "Acronyms", they are "Initialisms"

Sorry, but that's being pedantic.  IMHO it would have been worth drawing attention to if it the misuse had the potential to cause confusion or misunderstanding, but I really don't think that was the case.

dad_of_four Veteran Member • Posts: 7,921
Re: AVCHD Acronyms?

Sean Nelson wrote:

dad_of_four wrote:

Not to be pedantic, but none of those are "Acronyms", they are "Initialisms"

Sorry, but that's being pedantic. IMHO it would have been worth drawing attention to if it the misuse had the potential to cause confusion or misunderstanding, but I really don't think that was the case.

This criticism coming from a man who uses the word cromulent ?
Ohh, now that's rich - LOL

p.s. In case you can't tell, I am purposefully being a nerd.

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Sean Nelson
Sean Nelson Forum Pro • Posts: 11,969
Re: AVCHD Acronyms?

dad_of_four wrote:

Sean Nelson wrote:

dad_of_four wrote:

Not to be pedantic, but none of those are "Acronyms", they are "Initialisms"

Sorry, but that's being pedantic. IMHO it would have been worth drawing attention to if it the misuse had the potential to cause confusion or misunderstanding, but I really don't think that was the case.

This criticism coming from a man who uses the word cromulent ?
Ohh, now that's rich - LOL

Well, in my defence I think my use of "cromulent" shows that I treat the rules rather lightheartedly... 

...although I misspelled it as "crumulent" for many years until someone pointed out my mistake!  Ironic, no?

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