Method for updating an encoder by filter interpolation
AssigneeOrange
InventorsPierrick Philippe, David Virette
Life of this patent
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Abstract
A method for updating the processing capacity of an encoder or decoder to use a modulated transform having a size greater than a predetermined initial size is provided, particularly, where the encoders or decoders are for storing an initial prototype filter defined by an ordered set of initial size coefficients. A step is provided for constructing a prototype filter of a size greater than the initial size to implement the modulated transform of the greater size by inserting at least one coefficient between two consecutive coefficients of the initial prototype filter.
Claims14
A method for updating a processing capacity of an encoder or decoder in order to use a modulated transform having a size greater than a predetermined size, said encoder or decoder being adapted to store an initial prototype filter defined by an ordered set of coefficients of an initial size, said method comprising:
- constructing, using a computer processor, a prototype filter of a size greater than said initial size to implement the transform of a size greater than the predetermined size by inserting at least one coefficient between two consecutive coefficients of the initial prototype filter.
An encoder of digital signals, comprising:
- at least two memory areas that include a first memory area for storing a first set of coefficients defining an initial prototype filter of a given size, and second memory area for storing a computer program comprising instructions for delivering a second set of coefficients determined from coefficients in the first set, with the set formed by inserting coefficients from the second set between two consecutive coefficients of the first set, defining a prototype filter of a size greater than that of the initial prototype filter.
A decoder of digital signals, comprising:
- at least two memory areas that include a first memory area for storing a first set of coefficients defining an initial prototype filter of a given size, and a second memory area for storing a computer program comprising instructions for delivering a second set of coefficients determined from coefficients in the first set, with the set formed by inserting coefficients from the second set between two consecutive coefficients of the first set, defining a prototype filter of a size greater than that of the initial prototype filter.
Dependencies are inferred from the claim text.