Each character in korean is a syllable with an (optional) starting and ending consonants and a vowel in-between. Each stroke (approximately) matches each consonant and vowel. Typing korean inputs these 'strokes' that build each syllable and a sequence of them make a word.
So any korean keyboard would fit you definition though not in english. With the written language being strongly phonetic, anything can be sounded/written out. English consonants don't map 1:1 so there's inaccuracy/ambiguity.
Consonants/vowels isn't very high density though. It would be better to have a sort-of Huffman coding that a human can synthesize/parse based on frequencies and context. The world of shorthand writing probably has such examples.
Each character in korean is a syllable with an (optional) starting and ending consonants and a vowel in-between. Each stroke (approximately) matches each consonant and vowel. Typing korean inputs these 'strokes' that build each syllable and a sequence of them make a word.
So any korean keyboard would fit you definition though not in english. With the written language being strongly phonetic, anything can be sounded/written out. English consonants don't map 1:1 so there's inaccuracy/ambiguity.
Consonants/vowels isn't very high density though. It would be better to have a sort-of Huffman coding that a human can synthesize/parse based on frequencies and context. The world of shorthand writing probably has such examples.