Missing wiki - Definition of YUV420SP video format

Helmut Forren

I've figured it out, but there really SHOULD be a wiki entry over at http://processors.wiki.ti.com to define, with pictures even, the YUV420SP video format.

I searched the wiki for "420SP" and only 3 results came back, none of which defined the format. Meanwhile, wikipedia defines YUV420P (planar) at http://en.wikipedia.org/wiki/YUV#Y.27UV420p_.28and_Y.27V12_or_YV12.29 , including a nice picture.

But with "SP" meaning "semi-planar", what's "semi" about it? The forum post at http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/100/p/58574/208668.aspx#208668 spends the trivial amount of time to provide enough info to understand. In combination with the wikipedia entry, things become very clear, barring any unanticipated complication.

I strongly suggest that the power that be add a ti wiki entry remotely similar to the wikipedia one, for defining YUV420SP, aka 420SP in the literature. Perhaps this entry should also be organized by processor and provide a summary of capabilities with definitions for each processor. I believe I ran across a capabilities summary somewhere, but there were no definitions.

Thanks,

Helmut

over 13 years ago

Anshuman Saxena over 13 years ago

TI__Mastermind 19985 points

Hi Helmut,

We will try to get a Wiki entry for the YUV420SP data format. Most of the datasheets for the codecs on TI processors and also the datasheets of the SoC itself has the data format information, but i agree it might not be easy to search.

Helmut Forren said:
But with "SP" meaning "semi-planar", what's "semi" about it?

I hope you have got an idea of SemiPlanar. Basically, it is YUV planar format with UV interleaved, which makes it semiplanar.

Let me know if you need more details,

Regards,

Anshuman

Helmut Forren over 13 years ago in reply to Anshuman Saxena

Mastermind 6805 points

FYI, I just found a pdf from http://focus.ti.com/apps/docs/litabsmultiplefilelist.tsp?literatureNumber=sprab77a&docCategoryId=1&appId=198 that includes a definition of the YUV420SP format.

Perhaps the wiki home page for the DM6467(T) (and others) (http://processors.wiki.ti.com/index.php/Category:DM6467) can have a contents/link entry for "Video Formats" or some other title (including the word "Format", perhaps "Capture" or "VPIF", perhaps "Video"), that then references this pdf. This will help people FIND it.

-Helmut