An apparatus for encoding an audio signal having a stream of audio samples has: a windower for applying a prediction coding analysis window to the stream of audio samples to obtain windowed data for a prediction analysis and for applying a transform coding analysis window to the stream of audio samples to obtain windowed data for a transform analysis, wherein the transform coding analysis window is associated with audio samples within a current frame of audio samples and with audio samples of a predefined portion of a future frame of audio samples being a transform-coding look-ahead portion, wherein the prediction coding analysis window is associated with at least the portion of the audio samples of the current frame and with audio samples of a predefined portion of the future frame being a prediction coding look-ahead portion, wherein the transform coding look-ahead portion and the prediction coding look-ahead portion are identically to each other or are different from each other by less than 20%; and an encoding processor for generating prediction coded data or for generating transform coded data.

Claims

26 · 4 independent · depth 3

26 granted claims

›1.independentAn apparatus for encoding an audio signal comprising a stream of audio samples, comprising:na windower for applying a prediction coding analysis windo…+13

›2.↳ 1The apparatus of claim 1, wherein the transform coding analysis window comprises a non-overlapping portion extending in the transform-coding look-ahea…d2

›3.↳ 1The apparatus of claim 1, wherein the transform coding analysis window comprises a further overlapping portion starting at the beginning of the curren…d2

›4.↳ 1The apparatus of claim 1, in which the windower is configured to only use a start window for the transition from prediction coding to transform coding…d2

›5.↳ 1The apparatus in accordance with claim 1, further comprising:nan output interface for outputting an encoded signal for the current frame; andan encodi…d2

›6.↳ 1The apparatus in accordance with claim 1,nwherein the windower uses, in addition to the prediction coding analysis window, a further prediction coding…d2

›7.↳ 1The apparatus in accordance with claim 1,nwherein the frame comprises a plurality of subframes, wherein the prediction analysis window is centered to …d2+1

›9.↳ 1The apparatus in accordance with claim 1, wherein a further prediction coding analysis window does not comprise a look-ahead portion in the future fra…d2

›10.↳ 1The apparatus in accordance with claim 1, in which the transform coding analysis window additionally comprises a zero portion before a beginning of th…d2+1

›12.↳ 1The apparatus in accordance with claim 1, wherein a length in time of the transform coding analysis window is greater than a length in time of the pre…d2

›13.↳ 1The apparatus in accordance with claim 1, further comprising:nan output interface for outputting an encoded signal for the current frame; andan encodi…d2

›14.↳ 1The apparatus in accordance with claim 1, wherein the encoding processor comprises:na prediction coding analyzer for deriving prediction coding data f…d2

›15.independentA method of encoding an audio signal comprising a stream of audio samples, comprising:napplying a prediction coding analysis window to the stream of a…+1

›16.independentAn audio decoder for decoding an encoded audio signal, comprising:na prediction parameter decoder for performing a decoding of data for a prediction c…+7

›17.↳ 16The audio decoder of claim 16, wherein the current frame of the encoded audio signal comprises transform coded data and the future frame comprises pre…d2

›18.↳ 16The audio decoder of claim 16,nwherein the current frame comprises prediction coding data and the future frame comprises transform coding data,wherein…d2

›19.↳ 16The audio decoder of claim 16,nin which the transform parameter calculator comprises:a spectral weighter for weighting decoded transform spectral data…d2+1

›21.↳ 16The audio decoder of claim 16, wherein the synthesis window is configured to comprise a total time length less than 50 ms and greater than 25 ms, wher…d2

›22.↳ 16The audio decoder of claim 16,nwherein the synthesis window comprises a length of 30 ms without zero padded portions, the first and third overlap port…d2

›23.↳ 16The audio decoder of claim 16,nwherein the transform parameter decoder is configured to apply, for the spectral-time transform, a DCT transform compri…d2

›24.independentA method of decoding an encoded audio signal, comprising:nperforming a decoding of data for a prediction coded frame from the encoded audio signal;per…+1

Classifications

17 codes

IPC · International Patent Classification

Section G — Physics

G10L19/025
G10L19/107
G10L19/00
G10L19/005
G10L19/22
G10L19/03
G10L19/12
G10L19/012
G10L19/04
G10K11/16
G10L19/02
G10L25/06

USPC · US Patent Classification

704/219704/220704/208704/223704/222

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

1.7 y

615 days filing → grant

Office actions

none on record

Examiner

Vijay B Chawan

art unit 2658 · TC 2600

Law firm

Law firm · Log in to unlock

Citations: 204 back · 1 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

2 priority documents

Priority

14 Feb 2011

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 61442632	14 Feb 2011
related publication	US 20130332148 A1	12 Dec 2013

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.