The predictor looks at a 'window', which is usually defined in terms of n samples. If you make your window too short, you are not capturing any meaningful perio

The predictor looks at a 'window', which is usually defined in terms of n samples. If you make your window too short, you are not capturing any meaningful periodicity; if you make it too long you have sacrificed some error resilience and decoding convenience in exchange for hoping to get a better match for your predictor. Speech codecs (lossy) basically operate just like you describe, see [1] [1] https://en.wikipedia.org/wiki/Vocoder#Modern_implementations https://en.wikipedia.org/wiki/Vocoder#Modern_implementations