[FFmpeg-user] Glossary: d-NTSC & d-PAL

[Mark Filipak (ffmpeg)]

On 10/01/2020 01:03 PM, Jim DeLaHunt wrote:
> On 2020-10-01 06:27, Mark Filipak (ffmpeg) wrote:
> 
>> On 09/30/2020 11:56 PM, Jim DeLaHunt wrote:
>>> On 2020-09-30 20:36, Mark Filipak (ffmpeg) wrote:
>>>
>>>> Continuing with relatively non controversial entries:
>>>>
>>>> d-NTSC [noun]: 1, The digital equivalent of NTSC distinguished by
>>>>   binary metadata:
>>>>   720 samples/row: 'horizontal_size_value' = 0010 1101 0000
>>>>                    'horizontal_size_extension' = 00
>>>>   480 rows: 'vertical_size_value' = 0001 1110 0000
>>>>             'vertical_size_extension' = 00
>>>>   4:3 DAR: 'aspect_ratio_information' = 0010
>>>>   30/1.001 FPS: 'frame_rate_code' = 0100
>>>>   'progressive_sequence' = 0 & 'progressive_frame' = 0
>>>>
>>>> d-PAL [noun]: 1, The digital equivalent of PAL distinguished by binary
>>>>   metadata:
>>>>   720 samples/row: 'horizontal_size_value' = 0010 1101 0000
>>>>                    'horizontal_size_extension' = 00
>>>>   576 rows: 'vertical_size_value' = 0010 0100 0000
>>>>             'vertical_size_extension' = 00
>>>>   4:3 DAR: 'aspect_ratio_information' = 0010
>>>>   25 FPS: 'frame_rate_code' = 0011
>>>>   'progressive_sequence' = 0 & 'progressive_frame' = 0 
>>>
>>>
>>> It seems to me that these are no longer glossary entries — or, only the first line of each is a 
>>> glossary entry. ...
>>
>> …The sentence is a statement followed by a list of metadata that distinguishes the subject...
>> Do you have any suggestions? Should I just forget this glossary idea?
> 
> 
> What makes sense to me is a glossary which includes the entries:
> 
> d-NTSC [noun]: 1, The digital equivalent of NTSC
> 
> d-PAL [noun]: 1, The digital equivalent of PAL
> 
> Then a table of XYZ metadata entries which have been found in the wild:

Actually, not in the wild. They are from H.262.

> [Display the following table with fixed-width font]

Actually, Jim, what you sent is not in fixed-width font. :-)
So, you favor a formal table? I don't, but I guess that could go without saying, eh?
I format in plain text at 148 columns. I've found 70 columns to be too restricting and promotes 
crypticism (...is there such a word?). Personally, I don't think formal tables are needed, but if 
you do, then I'll make a formal table. But first, take a look at the current version, attached.

-- 
What if you woke up and found yourself in a police state?
African-Americans wake up in a police state every day.
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d-NTSC [noun]: The digital equivalent of NTSC. d-NTSC is distinguished via MPEG-PS binary metadata:
      'progressive_sequence' = 0              +         'progressive_frame' = 0      ...is a scan frame
  'aspect_ratio_information' = 0010           +           'frame_rate_code' = 0100   ...4:3 DAR + 30/1.001 FPS
     'horizontal_size_value' = 0010 1101 0000 + 'horizontal_size_extension' = 00     ...720 samples/row
       'vertical_size_value' = 0001 1110 0000 +   'vertical_size_extension' = 00     ...480 rows

d-PAL [noun]: The digital equivalent of PAL. d-PAL is distinguished via MPEG-PS binary metadata:
      'progressive_sequence' = 0              +         'progressive_frame' = 0      ...is a scan frame
  'aspect_ratio_information' = 0010           +           'frame_rate_code' = 0011   ...4:3 DAR + 25 FPS
     'horizontal_size_value' = 0010 1101 0000 + 'horizontal_size_extension' = 00     ...720 samples/row
       'vertical_size_value' = 0010 0100 0000 +   'vertical_size_extension' = 00     ...576 rows