Source: http://www.google.com/patents/US7941320?ie=ISO-8859-1&dq=5726663
Timestamp: 2015-05-24 06:35:46
Document Index: 1464141

Matched Legal Cases: ['application No. 60', 'art 1', 'art 1', 'art 1', 'art 1', 'Application No. 2007']

Patent US7941320 - Cue-based audio coding/decoding - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsGeneric and specific C-to-E binaural cue coding (BCC) schemes are described, including those in which one or more of the input channels are transmitted as unmodified channels that are not downmixed at the BCC encoder and not upmixed at the BCC decoder. The specific BCC schemes described include 5-to-2,...http://www.google.com/patents/US7941320?utm_source=gb-gplus-sharePatent US7941320 - Cue-based audio coding/decodingAdvanced Patent SearchPublication numberUS7941320 B2Publication typeGrantApplication numberUS 12/548,773Publication dateMay 10, 2011Filing dateAug 27, 2009Priority dateMay 4, 2001Fee statusPaidAlso published asUS7644003, US7693721, US8200500, US20050058304, US20080091439, US20090319281, US20110164756, WO2006014449A1Publication number12548773, 548773, US 7941320 B2, US 7941320B2, US-B2-7941320, US7941320 B2, US7941320B2InventorsFrank Baumgarte, Jiashu Chen, Christof FallerOriginal AssigneeAgere Systems, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (99), Non-Patent Citations (41), Referenced by (4), Classifications (32), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetCue-based audio coding/decoding
This application is a continuation of U.S. application Ser. No. 10/936,464 (“the '464 application”), filed on Sep. 8, 2004, which claims the benefit of the filing date of U.S. provisional application No. 60/585,703, filed on Jul. 6, 2004, the teachings of which are incorporated herein by reference.
The 5-to-2 BCC scheme of FIG. 5 can also be extended to a 5.1-to-2 BCC scheme, where the six channels of 5.1 surround sound are downmixed to two transmitted channels, where the “0.1” indicates the low-frequency effects (LFE) channel in 5.1 surround sound. In this scheme, like the center channel in FIG. 5, the LFE channel can be attenuated by 3 dB and added to both transmitted channels. In that case, the base channel for synthesizing the playback LFE channel at the decoder is the sum of the two transmitted channels, as is the case for the playback center channel. As described in U.S. patent application Ser. No. 10/827,900, filed on Apr. 20, 2004 , the teachings of which are incorporated herein by reference, BCC processing for the LFE channel might only be applied at certain (e.g., low) frequencies.
FIG. 6 represents one possible implementation of 6-to-5 BCC processing in which six input channels xi(n) are downmixed to five transmitted channels yi(n), which are subsequently subjected to upmixing and BCC synthesis to form six playback channels {circumflex over (x)}i(n), for the loudspeaker arrangement shown in FIG. 6A. This 6-to-5 BCC scheme can be used for 5-channel backwards compatible coding of 6-channel surround signals, such as those used in “Dolby Digital-Surround EX.”In particular, FIG. 6A represents the downmixing scheme applied to the six input channels xi(n) to generate the five transmitted channels yi(n), where the downmixing matrix D65 used in Equation (1) is given by Equation (7) as follows:
FIG. 10 represents one possible implementation of 6.2-to-5.1 BCC processing in which eight input channels xi(n) are downmixed to six transmitted channels yi(n), which are subsequently subjected to upmixing and BCC synthesis to form eight playback channels {circumflex over (x)}i(n), for the loudspeaker arrangement shown in FIG. 10A, where the “0.2” denotes the presence of two LFE channels. This 6.2-to-5.1 BCC scheme can be used for 5.1-surround backwards compatible coding of 6.2-surround signals.
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