The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 1993
Filed:
Sep. 05, 1991
Ira A Gerson, Hoffman Estates, IL (US);
Mark A Jasiuk, Chicago, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Lag information for use in a speech coder is developed by estimating lag values for the various subframes (201) of a speech coding frame (200) of information, and by then selecting lag values for each subframe that are both closely corresponding to the estimated lag values and that also observe the restrictions of a selected delta-coding routine. When a plurality of candidate sets of such information have been developed, they are compared against one another to identify that set which appears to provide the best set of lag values. This information is then available for framing and transmission. In one embodiment, the sets of candidate values are also selected to ensure provision for subsequent adjustment in either a positive or negative direction. With this adjustability capability so provided, closed-loop adjustments can be made with respect to the selected values to ensure that the ultimately transmitted coding for the lag value most closely corresponds to an ultimate output that most closely represents the speech signal to be represented.