[MPEG-OTSPEC] Two GSUB Proposals for OFF: 'cabp' and 'hypy'

[suzuki toshiya]

Dear Eiso, Fuji-san,

I checked 現代漢語拼音方案2012 available at

http://edu.shandong.gov.cn/attach/0/b72295c44ff442c8b333a481f524dbe9.pdf

I guess, the glyphs you want to care might be:

"a" in "ai" (哀), "uan" (弯), "Van" (冤) in 韻母表
"g" in "ang" (昂), "eng" (亨的韵母), "ieng" (英), "ueng" (翁), "veng" (雍) in 韻母表

Am I understanding correctly?

漢語拼音方案1958 (I'm unsure the source of this scanned image):

http://www.moe.gov.cn/ewebeditor/uploadfile/2015/03/02/20150302165814246.pdf

there is no clear distinction of the typeface for "a" & "g".

A distinction of "a" is mentioned in the 四、声調符号, special "a" is used for 軽声,
maybe it would be the update introduced in 2012.

But yet I'm unsure about the background to distinguish "g".

Regards,
mpsuzuki

On 2024/02/29 22:28, 陈永聪 via mpeg-otspec wrote:
> Fuji-San,
> 
> Thank you for your comments. The most official materials for Hanyu Pinyin forms are 汉语拼音方案 and 现代汉语词典.
> 
> Eiso
> ---- Replied Message ----
>  From    Takaaki Fuji 藤 貴亮<tfuji at morisawa.co.jp><mailto:tfuji at morisawa.co.jp>
> Date    02/29/2024 下午6:45
> To      陈永聪 <eisoch at 126.com><mailto:eisoch at 126.com>
> Cc      mpeg-otspec <mpeg-otspec at lists.aau.at><mailto:mpeg-otspec at lists.aau.at>
> Subject Re: [MPEG-OTSPEC] Two GSUB Proposals for OFF: 'cabp' and 'hypy'
> Dear Eiso,
> 
> I'm just curious, but for ‘hypy’, is there any good source I can look at for the ‘official' glyph forms of Hanyu Pinyin?
> 
> If I understand the issue correctly, ‘hypy’ is not only about the Futura-like one-story a/g shown in Example, but also the tone marks are preferred to have a 'reverse-modulation’; while an acute is always stroked from top to bottom as a Latin accent, as a Pinyin mark it goes upwards from left to right to illustrate the second/rising tone. I imagine this conflict/divergence has long been such an issue in a dual-script situation, so switching between the two via GSUB sounds like a great improvement to me!
> 
> Thank you,
> 
> Takaaki Fuji
> 
>> On Feb 26, 2024, at 9:38, 陈永聪 via mpeg-otspec <mpeg-otspec at lists.aau.at> wrote:
>>
>> This is my first proposal for OFF. Please see http://cloud.caaph.com:10121/f/fed7bd2e3d/
>> I suggest adding two GSUB features. 'cabp' is used to support GB/Z 40637—2021, 'hypy' is used to support the special glyphs forms used for Hanyu Pinyin.
>>
>> If you have any suggestions or feedbacks, please let me know.
>>
>> Regards,
>> Eiso_______________________________________________
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>> mpeg-otspec at lists.aau.at
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>