Digital speech coder having improved sub-sample resolution long-term predictor

Abstract

A digital speech coder includes a long-term filter (124) having an improved sub-sample resolution long-term predictor (FIG. 5 ) which allows for subsample resolution for the lag parameter L. A frame of N samples of input speech vector s(n) is applied to an adder (510). The output of the adder (510) produces the output vector b(n) for the long term filter (124) . The output vector b(n) is fed back to a delayed vector generator block (530) of the long-term predictor. The nominal long-term predictor lag parameter L is also input to the delayed vector generator block (530). The long-term predictor lag parameter L can take on non-integer values which may be multiples of one half one third one fourth or any other rational fraction. The delayed vector generator (530) includes a memory which holds past samples of b(n). In addition interpolated samples of b(n) are also calculated by the delayed vector generator (530) and stored in its memory at least one interpolated sample being calculated and stored between each past sample of b(n). The delayed vector generator (530) provides output vector q(n) to the long-term multiplier block (520) which scales the long-term predictor response by the long-term predictor coefficient ?. The scaled output ?q(n) is then applied to the adder (510) to complete the feedback loop of the recursive filter (124).

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Technology	Declaration Information			Specification Information	Explicitly Disclosed	Patent Type
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Not Available	08/06/2000	ISLD-200006-001	MOTOROLA INC	S1 TS Number: Not Available Version No: ---- Illustrative part: ---- Release No: ---- + -	Yes	Basis Patent
Not Available	19/01/2001	ISLD-200101-005	MOTOROLA INC	S1 TS Number: ETS 300 395-2 Version No: ---- Illustrative part: ---- Release No: ---- + -	No	Family Member
Not Available	20/02/2002	ISLD-200203-004	MOTOROLA INC	S1 TS Number: EN 300 726 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: EN 300 969 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: EN 301 704 Version No: ---- Illustrative part: ---- Release No: ---- +2 -2	No	Family Member
2G	20/12/2002	ISLD-200210-006	MOTOROLA INC	S1 TS Number: TS 101 01 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 141 102 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: TS 141 103 Version No: ---- Illustrative part: ---- Release No: ---- S4 TS Number: TS 141 104 Version No: ---- Illustrative part: ---- Release No: ---- +3 -3	No	Family Member
2G	20/12/2002	ISLD-200210-006	MOTOROLA INC	S1 TS Number: TS 141 104 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 101 01 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: TS 141 102 Version No: ---- Illustrative part: ---- Release No: ---- S4 TS Number: TS 141 103 Version No: ---- Illustrative part: ---- Release No: ---- +3 -3	Yes	Basis Patent
3G	20/12/2002	ISLD-200210-006	MOTOROLA INC	S1 TS Number: TS 121 101 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 121 102 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: TS 121 103 Version No: ---- Illustrative part: ---- Release No: ---- S4 TS Number: TS 121 104 Version No: ---- Illustrative part: ---- Release No: ---- +3 -3	No	Family Member
3G	20/12/2002	ISLD-200210-006	MOTOROLA INC	S1 TS Number: TS 121 101 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 121 102 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: TS 121 103 Version No: ---- Illustrative part: ---- Release No: ---- S4 TS Number: TS 121 104 Version No: ---- Illustrative part: ---- Release No: ---- +3 -3	Yes	Basis Patent
5G,4G,3G,2G	20/12/2002	ISLD-200210-006	MOTOROLA INC	S1 TS Number: TS 126 190 Version No: ---- Illustrative part: 6.1 Release No: ---- + -	Yes	Basis Patent
Not Available	20/12/2002	ISLD-200210-006	MOTOROLA INC	S1 TS Number: TS 141 103 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 101 855 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: TS 121 101 Version No: ---- Illustrative part: ---- Release No: ---- S4 TS Number: TS 121 102 Version No: ---- Illustrative part: ---- Release No: ---- S5 TS Number: TS 121 103 Version No: ---- Illustrative part: ---- Release No: ---- S6 TS Number: TS 141 102 Version No: ---- Illustrative part: ---- Release No: ---- +5 -5	No	Family Member
Not Available	20/12/2002	ISLD-200210-006	MOTOROLA INC	S1 TS Number: TS 101 855 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 121 101 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: TS 121 102 Version No: ---- Illustrative part: ---- Release No: ---- S4 TS Number: TS 121 103 Version No: ---- Illustrative part: ---- Release No: ---- S5 TS Number: TS 141 102 Version No: ---- Illustrative part: ---- Release No: ---- S6 TS Number: TS 141 103 Version No: ---- Illustrative part: ---- Release No: ---- +5 -5	Yes	Basis Patent
Not Available	08/04/2003	ISLD-200304-008	MOTOROLA INC	S1 TS Number: Not Available Version No: ---- Illustrative part: ---- Release No: ---- + -	No	Family Member

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Digital speech coder having improved sub-sample resolution long-term predictor

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