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公开(公告)号：CA2300495C
公开(公告)日：2005-01-11
申请号：CA2300495
申请日：2000-03-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KROON PETER , SINHA DEEPEN
IPC: G10L19/02 , G10L19/00 , G10L19/14 , H03M7/30 , H04M11/00 , H04N7/24 , H04N7/26 , H03M7/00 , H04L12/56
Abstract: In a communications system, multi-rate coding in accordance with the invention is implemented to generate multiple representations of an audio signal at different rates. These representations contain equivalent and/or various amounts of audio information. In an illustrative embodiment, at least one of the representations is a core representation containing core audio information. The remaining representations are enhancement representations containing enhancement audio information. The core representation is necessary for recovering the audio signal with minimal acceptable quality. Such quality is enhanced when the core representation, together with one or more of the enhancement representations, is used to recover the audio signal.
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公开(公告)号：DE60101984T2
公开(公告)日：2004-12-16
申请号：DE60101984
申请日：2001-08-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CASEY WILLIAM J III , KARTER NICHOLAS G , SINHA DEEPEN
Abstract: Audio tracks or other portions of a particular type of audio material to be encoded are analyzed to determine a value of at least one coding-related parameter suitable for providing optimal encoding of the particular type of audio material. When a given portion of the audio material is to be encoded for transmission in a perceptual audio coder of a communication system, the value of the coding-related parameter is identified and then utilized in conjunction with the encoding of the given portion. The determined value of the coding-related parameter may be at least a portion of a psychoacoustic model utilized in encoding the given portion of the particular type of audio material in the perceptual audio coder. As another example, the value of the coding-related parameter may be a setting of an audio processor utilized to process the given portion of the particular type of audio material prior to encoding the given portion in the perceptual audio coder.
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43.发明专利
公开(公告)号：CA2327681C
公开(公告)日：2004-08-17
申请号：CA2327681
申请日：2000-12-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LANEMAN JERRY NICHOLAS , SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: Improved channel code configurations for use in transmission of digital audi o or other types of information in a digital communication system. The channel code may include an outer channel code, e.g., a cyclic redundancy code (CRC), and an inner chann el code, e.g., a complementary punctured pair convolutional (CPPC) code. In accordance with the invention, multiple code words of the outer code are associated with a given packet of the digital information, in accordance with a particular outer code configuratio n, so as to provide partial error flagging for different portions of the given packet. An information encoder, e.g., a PAC encoder, interacts with an outer code encoder to determine a bit allocation for transmission of packets at a particular bit rate, based at least in part on the outer code configuration. The invention is particularly well-suited for use in the transmission of digital audio information in a hybrid in-band on-channel (HIBOC) digital audio broadcasting (DAB) system, but is also applicable to other types of information and other types of communication systems.
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公开(公告)号：CA2295283C
公开(公告)日：2004-08-17
申请号：CA2295283
申请日：2000-01-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SUNDBERG CARL-ERIK WILHELM , SINHA DEEPEN
Abstract: The invention provides methods and apparatus for processing information, e.g ., audio, video or image information, for transmission in a communication syste m. In an illustrative embodiment, a joint multiple program coder determines the value of a single-bit or multiple-bit criticality measure, e.g., criticality flag, in a designated interval, e.g., the duration of an audio frame, for each of the programs in a set of multiple programs to be transmitted in the system. The joint multiple program coder allocates a pool of available bits to the programs based at least in part on the determined values of the criticality measures, such that a program with a higher-valued criticality measure in the designat ed time interval is allocated a greater percentage of the available bits for that interval th an another one of the programs with a lower-valued criticality measure. The joint multiple program coder repeats the determination and allocation operations for each of a number of time intervals, e.g., frames, such that the bit allocation can vary from interval to interval.
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Patent Agency Ranking
公开(公告)号：CA2300579C
公开(公告)日：2004-02-10
申请号：CA2300579
申请日：2000-03-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM , LOU HUI-LING
IPC: H04L27/00 , H04B1/04 , H04B1/16 , H04B15/00 , H04H20/30 , H04H60/07 , H04J1/00 , H04B14/08 , H04L27/26
Abstract: In a communications system implementing, e.g., an in- band on channel AM (IBOC-AM) (also known as "hybrid IBOC- AM") scheme, multiple bit streams are used to represent an audio signal to be transmitted over one or more frequency bands including, e.g., parts of an AM frequency band for radio broadcast. These bit streams contain various and/or equivalent amounts of audio information. In an illustrative embodiment, at least one of the bit streams is a core bit stream containing core audio information. The remaining bit streams are enhancement bit streams containing enhancement audio information. The core bit stream is necessary for recovering the audio signal with minimal acceptable quality. Such quality is enhanced when the core bit stream, together with one or more of the enhancement bit streams, is used to recover the audio signal. In accordance with the invention, the AM frequency band is divided. into subbands. Each of the core and enhancement bit streams is assigned to a respective one of the subbands for transmission. The assignment is conducive to an effective treatment of interference affecting the IBOC-AM system. Other embodiments may include, e.g., communications of the multiple bit streams in accordance with the invention in an IBOC-FM system, a satellite broadcasting system, etc.
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公开(公告)号：CA2326495C
公开(公告)日：2004-02-03
申请号：CA2326495
申请日：2000-11-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN
Abstract: In a communications system, parametric coding in accordance with the invention is implemented to generate a representation of a stereo audio signal, which is composed of a left channel signal (L) and a right channel signal (R). To efficiently utilize transmission bandwidth, such a representation contains (1) information concerning only one of the L and R signals, and (2) parametric information based on which, together with (1), the other signal can be recovered. Because of the design of the parametric coding, the representation advantageously captures localization cues of the stereo audio signal, including intensity and phase characteristics of L and R. As a result, tie stereo audio signal recovered from the transmitted representation affords a high stereo quality.
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公开(公告)号：CA2295281C
公开(公告)日：2003-11-04
申请号：CA2295281
申请日：2000-01-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: The invention provides methods and apparatus for decoding multiple program information, e.g., audio, video or image information, in a communication system. In an illustrative embodiment, a multiple program decoder includes a deinterleaver for deinterleaving information corresponding to a set of frames, using a specifi ed deinterleaving length. A given one of the frames includes information from each of at least a subset of the programs, and the frames are encoded using an outer code, e.g., a CRC code, RS code, BCH code or other type of linear block code, and an inner code, e.g., a convolutional code, turbo code or trellis coded modulation. The multiple program decoder include s an inner code decoder for decoding the inner code over one or more of the programs, a nd an outer code decoder for decoding the outer code for a selected one of the programs. The deinterleaving length of the deinterleaver and operating rate of the inner code decoder can be configured such that the multiple program decoder provides substantially instantaneous tuning within a given cluster of programs, or within a set of clusters each including multiple programs. The programs may, but need not, include jointly-coded audio programs. The invention may be implemented in numerous applications, such as simultaneous multiple program listening and/or recording, simultaneous delivery of audio and data, etc.
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48.发明专利
公开(公告)号：CA2327681A1
公开(公告)日：2001-06-15
申请号：CA2327681
申请日：2000-12-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM , LANEMAN JERRY NICHOLAS
Abstract: Improved channel code configurations for use in transmission of digital audi o or other types of information in a digital communication system. The channel code may include an outer channel code, e.g., a cyclic redundancy code (CRC), and an inner chann el code, e.g., a complementary punctured pair convolutional (CPPC) code. In accordance with the invention, multiple code words of the outer code are associated with a given packet of the digital information, in accordance with a particular outer code configuratio n, so as to provide partial error flagging for different portions of the given packet. An information encoder, e.g., a PAC encoder, interacts with an outer code encoder to determine a bit allocation for transmission of packets at a particular bit rate, based at least in part on the outer code configuration. The invention is particularly well-suited for use in the transmission of digital audio information in a hybrid in-band on-channel (HIBOC) digital audio broadcasting (DAB) system, but is also applicable to other types of information and other types of communication systems.
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公开(公告)号：CA2199070A1
公开(公告)日：1997-09-19
申请号：CA2199070
申请日：1997-03-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： JOHNSTON JAMES DAVID , SINHA DEEPEN
Abstract: An audio coding technique which utilizes a signal adaptive switched filterbank having a first filterbank and a wavelet filterbank. The filterbank sw itches between the first filterbank and the wavelet filterbank to filter an input signa l as a function of the stationarity of the input signal. The first filterbank is utilized to fil ter stationary signal components. The wavelet filterbank is utilized to filter non-stationary s ignal components (e.g., attacks).
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