Patent US2755434A successfully refreshed from Google Patents.
US5699485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch delay modification during frame erasures
Assignee: BlackBerry Ltd
•
Filing: 1995-06-07
•
Granted: 1997-12-16
•
Expires: 2015-06-07
Abstract
Abstract In a speech decoder which experiences frame erasure, the pitch delay associated with the first of consecutive erased frames is incremented. The incremented value is used as the pitch delay for the second of consecutive erased frames. Pitch delay associated with the first of consecutive erased frames may correspond to the last correctly received pitch delay information from a speech encoder (associated with a non-erased frame), or it may itself be the result of an increment added to a still previous value of pitch delay (associated with a still previous erased frame).
Inventors
- 👤 Yair Shoham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:24
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/24; H04B7/26; G; G10; G10L; G10L19/00; G10L19/005; G10L21/00; G10L21/003; G10L21/007; G10L21/013
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A method for use in a speech decoder which falls to receive reliably at least a portion of each of first and second consecutive frames of compressed speech information, the speech decoder including a codebook memory for supplying a vector signal in response to a signal representing pitch-period information, the vector signal for use in generating a decoded speech signal, the method comprising: storing a signal having a value representing pitch-period information corresponding to said first frame; and incrementing said value of said signal for use in said second frame, such that said codebook memory supplies a vector signal in response to the incremented value of said signal.
Claim 2
Independent Claim
108 words
A method for use in a speech decoder which falls to receive reliably at least a portion of each of first and second consecutive frames of compressed speech information, the speech decoder including a codebook memory for supplying a vector signal in response to a signal representing pitch-period information, the vector signal for use in generating a decoded speech signal, the method comprising: storing a signal having a value representing pitch-period information corresponding to said first frame; and incrementing said value of said signal for use in said second frame, such that said codebook memory supplies a vector signal in response to the incremented value of said signal.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the value of the signal representing pitch-period information is in units of samples of a signal representing speech information.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein the step of incrementing comprises incrementing a number of samples representing a pitch-period.
Claim 5
Dependent Claim
38 words
The method of claim 1 wherein the signal value representing pitch-period informtion corresponding to said first frame is equal to a value of pitch-period information received in a frame in which no failure to receive information has occurred.
Claim 6
Independent Claim
98 words
A method for use in a speech decoder which fails to receive reliably at least a portion of a frame of compressed speech information for first and second consecutive frames, the speech decoder including an adaptive codebook memory for supplying codebook vector signals for use in generating a decoded speech signal in response to a signal representing pitch-period information, the method comprising: storing a signal having a value representing pitch-period information corresponding to said first frame; and if said stored value does not exceed a threshold, incrementing said value of said signal for use in said second frame.
Claim 7
Independent Claim
98 words
A method for use in a speech decoder which fails to receive reliably at least a portion of a frame of compressed speech information for first and second consecutive frames, the speech decoder including an adaptive codebook memory for supplying codebook vector signals for use in generating a decoded speech signal in response to a signal representing pitch-period information, the method comprising: storing a signal having a value representing pitch-period information corresponding to said first frame; and if said stored value does not exceed a threshold, incrementing said value of said signal for use in said second frame.
References Cited (Backward Citations)
US5305332A
Cited
US5550543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-15 | 2001-06-16 | 2001-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-15 | 2005-06-16 | 2005-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-15 | 2009-06-16 | 2009-12-16 | $7700.00 | Window Closed / Lapsed |