Speech coding exploits production models for low bit rates without databases
Evidence
In Figure 5.11, speech production is finally reduced into a signal model, the so-called sourceāfilter model. In voiced signals (in phonation), the source is the glottal oscillation and in unvoiced sounds the source is frication noise created in a constriction or a transient sound generated by rapid release of pressure when a vocal tract closure is opened. ā Ville Pulkki, Matti Karjalainen, Communication Acoustics- Anā¦, 600 (
#expands, via linked claim)
Categorization
Category: Definitional Content
Related
- Speech production reduces to a source-filter model with glottal or noise sources (similarity 0.91)
- Voiced and unvoiced speech differ in whether source is glottal oscillation or frication noise (similarity 0.88)
- Speech coding is the most mature speech technology because it needs no databases. (similarity 0.85)
- Mathematical source-filter models of speech enable practical synthesis and coding algorithms (similarity 0.85)
- A unified source-filter model describes human and synthetic voice alike (similarity 0.84)
- Speech production can be modeled mathematically to derive useful signal processing algorithms (similarity 0.83)
- Speech production reduces to lungs as compressor driving a glottal oscillator through resonating tracts (similarity 0.83)
- The vocal apparatus functions as a pressure source driving a resonant filter system (similarity 0.83)
- Speech coding is fundamentally a quality-versus-bitrate optimization tradeoff. (similarity 0.82)
- Singing is modeled as vocal-fold excitation filtered by a time-varying vocal tract (similarity 0.80)
- Audio coding aims to reconstruct signals while other processing modifies them (similarity 0.80)
- A huge variety of speech sounds can be made without vocal folds (similarity 0.79)
- Synthesis and recognition demand language knowledge databases that coding does not. (similarity 0.79)
- Human speech evolved as a robust channel tolerant to high background noise (similarity 0.79)
- The vocal tract can be simulated as a cascade of acoustic transmission line segments (similarity 0.78)
Broader Connections
- Speech production reduces to a source-filter model with glottal or noise sources
#expands(0.85) ā Ville Pulkki, Matti Karjalainen, Communication Acoustics- Anā¦, 600