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公开(公告)号：DE60101984D1
公开(公告)日：2004-03-18
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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32.发明专利
公开(公告)号：CA2327772A1
公开(公告)日：2001-06-15
申请号：CA2327772
申请日：2000-12-07
Applicant: LUCENT TECHNOLOGIES INC
Abstract: Improved error screening techniques for use in processing digital audio or other types of information received in a digital communication system. Control information associated with a given packet of the received information is identified and compared with a decoding requirement of the packet, in order to control the generation of an error indicator for the packet. More particularly, the error indicator may be generated in response to an inconsistency between the control information and the decoding requirement. For example, the control information may include an indication of packet length that can be compared to a number of bits required to decode the corresponding packet, with any inconsistency between the packet length indication and the number of required bits leading to the generation of an error flag for the packet. The invention is particularly we ll- suited for use in the processing of encoded digital audio information received 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：CA2326495A1
公开(公告)日：2001-06-03
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, the stereo audio signal recovered from the transmitted representation affords a high stereo quality.
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公开(公告)号：CA2302608A1
公开(公告)日：2000-09-29
申请号：CA2302608
申请日：2000-03-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SUNDBERG CARL-ERIK WILHELM , SINHA DEEPEN , MANSOUR DAVID
IPC: H04L1/00 , H04B1/04 , H04H20/30 , H04H60/07 , H04J1/00 , H04J13/00 , H04L5/02 , H04L5/00 , H04H5/00
Abstract: Methods and apparatus for processing information, e.g., audio, speech, video or image information, for transmission in a communication system. In an illustrative embodiment, a set of bit streams are generated from an audio information signal. The set of bit streams may be, e.g., a total of four bit streams generated by separating each of two multiple description bit streams, corresponding to separate representations of the audio information signal, into first and second class bit streams. The first and second class bit streams associated with the first multiple description bit stream may then be transmitted in respective first and second subbands of a first sideband of an FM host carrier, while the first and second class bit streams associated with the second multiple description bit stream are transmitted in respective first and second subbands of a second sideband of the FM host carrier. The first class bit streams may be provided with a different level of error protection than the second class bit streams, e.g., by utilizing different portions of a non-uniform power profile for the corresponding subbands, or by placement of the bit streams in subbands having different susceptibility to interference. Delay may be introduced between at least a subset of the bit streams in order to provide improved performance, e.g., in the presence of fading.
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35.发明专利
公开(公告)号：DE69942968D1
公开(公告)日：2011-01-05
申请号：DE69942968
申请日：1999-12-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
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Patent Agency Ranking
公开(公告)号：DE60040716D1
公开(公告)日：2008-12-18
申请号：DE60040716
申请日：2000-12-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LANEMAN JERRY NICHOLS , SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: Improved channel code configurations for use in transmission of digital audio 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 channel 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 configuration, 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：DE69939793D1
公开(公告)日：2008-12-11
申请号：DE69939793
申请日：1999-02-02
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: An audio information bit stream including audio control bits and audio data bits is processed for transmission in a communication system. The audio data bits are first separated into n classes based on error sensitivity, that is, the impact of errors in particular audio data bits on perceived quality of an audio signal reconstructed from the transmission. Each of the n different classes of audio data bits is then provided with a corresponding one of n different levels of error protection, where n is greater than or equal to two. The invention thereby matches error protection for the audio data bits to source and channel error sensitivity. The audio control bits may be transmitted independently of the audio data bits, using an additional level of error protection higher than that used for any of the n classes of the audio data bits. Alternatively, the control bits may be combined with one of the n classes of audio data bits and provided with the highest of the n levels of error protection. Further protection may be provided for the control bits by repeating at least a portion of the control bits from a current packet of the audio information bit stream in a subsequent packet of the audio information bit stream. Moreover, the classification of audio data bits into n different classes can be implemented on a fixed packet-by-packet basis, or in a more flexible, adaptive implementation in which different multipacket error protection profiles are used for different multipacket segments of a source-coded audio signal.
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公开(公告)号：DE60033718T2
公开(公告)日：2007-11-29
申请号：DE60033718
申请日：2000-03-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MANSOUR DAVID , SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
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公开(公告)号：DE60033718D1
公开(公告)日：2007-04-19
申请号：DE60033718
申请日：2000-03-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MANSOUR DAVID , SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
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公开(公告)号：DE69931570D1
公开(公告)日：2006-07-06
申请号：DE69931570
申请日：1999-09-21
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: The invention provides methods and apparatus for processing information, e.g., audio, video or image information, for transmission in a communication system. In an illustrative embodiment, interference characteristics are determined for a set of n channels to be used to transmit audio information bits, where n is greater than or equal to two. The audio information bits are separated into n classes based on error sensitivity, for example, the impact of errors in particular audio data bits on perceived quality of an audio signal reconstructed from the transmission. The classes of bits are then assigned to the n channels such that the classes of bits having the greatest error sensitivity are transmitted over the channels which are the least susceptible to interference. The interference characteristics associated with the n channels can be determined by, for example, measuring interference levels for one or more of the channels, or obtaining information regarding known interference levels for one or more of the channels. The channels may correspond to different frequency bands, time slots, code division slots or any other type of channels. The invention can provide UEP for different classes of audio information bits even in cases in which the same convolutional code, or the same complementary punctured pair convolutional (CPPC) code pair, is used to encode the classes. The assignment of the classes of bits to the channels, as well as the characteristics of the classes and the channels, may be fixed or dynamic.
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