Context: Other types of lossy compressors, such as the linear predictive coding (LPC) used with speech, are source-based coders. These coders use a model of the sound's generator (such as the human vocal tract with LPC) to whiten the audio signal (i.e., flatten its spectrum) before quantization. LPC may be thought of as a basic perceptual coding technique: reconstruction of an audio signal using a linear predictor shapes the coder's quantization noise into the spectrum of the target signal, partially masking it.

Question: What is the coding called that is used with speech?
Answer: linear predictive coding

Question: What is thought of as a basic perceptual coding technique?
Answer: linear predictive coding

Question: What uses a model of the sound's generator? 
Answer: source-based coders

Question: What is thought of as a basic signal coding technique?
Answer: Unanswerable

Question: What uses a model of the sound's quantization?
Answer: Unanswerable

Question: What may be thought of as a basic perceptual spectrum?
Answer: Unanswerable

Question: What does reconstruction of an audio signal shape the coder's compressor noise into?
Answer: Unanswerable

Question: What may be thought of as a generator coding technique?
Answer: Unanswerable