Vector transform coder with multi-layered codebooks and...

Details Vector transform coder with multi-layered codebooks and... Vector transform coder with multi-layered codebooks and...

G - Physics

06

T

G06T 9/00 (2006.01)

Patent

CA 2185322

In a vector transform coding (VTC) scheme for image and video compression, a multi-layered codebook structure and a dynamic bit-allocation scheme in the vector transform domain are employed. The main advantage of this technique is that distortion is controlled by dynamically allocating more bits to vectors causing larger distortions and less bits to vectors causing smaller distortions.

Un schéma de codage par transformée vectorielle pour la compression d'images et de signaux vidéo fait appel à une structure multicouche de tables de codes et à un schéma d'affectation dynamique des bits dans le domaine de la transformation vectorielle. Le principal avantage de cette technique est que la distorsion est régulée grâce à l'attribution dynamique d'un plus grand nombre de bits aux vecteurs qui provoquent des distorsions importantes et d'un plus petit nombre de bits aux vecteurs qui provoquent des distorsions moins importantes.

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