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1.发明专利
公开(公告)号：JP2002149197A
公开(公告)日：2002-05-24
申请号：JP2001271142
申请日：2001-09-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CASEY WILLIAM J III , KARTER NICHOLAS G , SINHA DEEPEN
Abstract: PROBLEM TO BE SOLVED: To decide at least one encoding related parameter which is suitable for the optimum encoding of a specified type of audio material by analyzing the audio track of the specified type of audio material or another part. SOLUTION: When the given part of the specified type of audio material is encoded for transmission in the perceptual audio coder of a communication system, the value of an encoding related parameter is identified and, then, it is utilized with the encoding of the given part. The decided value of the encoding related parameter can be at least a part of an acoustic and psychological model which is utilized for the purpose of encoding the given part of the specified type of audio material in the perceptual audio coder. In another example, the value of the encoding related parameter can be the setting of an audio processor to be utilized for the purpose of processing the given part of the specified type of audio material before encoding the given part in the perceptual audio coder.
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公开(公告)号：JP2000311000A
公开(公告)日：2000-11-07
申请号：JP2000090014
申请日：2000-03-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KROON PETER , SINHA DEEPEN
Abstract: PROBLEM TO BE SOLVED: To maintain lowest permissible signal quality even if a channel or network state is insufficient, by allowing each packet to contain at least one information content obtained from one of expressions, and an indicator for discriminating the expression that the information is obtained. SOLUTION: Each packet outputted by a packetizer 285 contains sequence indices corresponding to each time segment of music and expression indices corresponding to each expression information of C, E1, E2. In the case that a time limit has passed before a client terminal receives all predicted packets during the time segment by packet steam processing from a server 105, the client terminal judges that it has received a packet containing at least C- expression information, and then, extracts expression information contents from the packets received during the time segment, and makes a signal analog a(t) of the music corresponding to the time segment recover. In such a case, audio recovery is at least C-expression information.
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公开(公告)号：JP2001211142A
公开(公告)日：2001-08-03
申请号：JP2000381164
申请日：2000-12-15
Applicant: LUCENT TECHNOLOGIES INC
Abstract: PROBLEM TO BE SOLVED: To provide improved error detection technology used to process digital audio information received by a digital communication system or information of other types. SOLUTION: To control the generation of an error indicator for a packet, control information relating to a given packet of received information is specified and compared with the decoding condition of the packet. More specifically, the error indicator can be generated according to the inconsistency between the control information and decoding condition. For example, when arbitrary inconsistency between a packet length indication and the necessary number of bits results in the generation of an error flag for the packet, the control information possibly includes an indication of packet length which can be compared with the number of bits needed to decode the corresponding packet. This invention is used suitably, specially, for the processing of encoded digital audio information received by a hybrid in-band on-channel (HIBOC) digital audio broadcasting(DAB) system, but applicable to information of other types and communication systems of other types.
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公开(公告)号：JP2000341247A
公开(公告)日：2000-12-08
申请号：JP2000089513
申请日：2000-03-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MANSOUR DAVID , SINHA DEEPEN , CARL-ERIK WILHELM
Abstract: PROBLEM TO BE SOLVED: To cope with contiguous channel interference in a contiguous area of an in-band on-channel system by transmitting multiple bit streams generated from an information signal according to multiple factors by using the frequency band of a host carrier signal. SOLUTION: An embedded audio encoder 203 is supplied with an analog audio signal a(t) and generates a C stream, an El stream, and an E2 stream representing analog signals on leads 209a, 209b, and 209c, The bit rates of the C stream, E1 stream, and E2 stream are M, S1, and S2 kb/sec respectively. For example, when the encoder 203 is a 48 kb/sec audio encoder, M, S1, and S2 can be 16, 16, and 16, respectively. The quality of the combination of the C stream, E1 stream, and E2 stream is much higher than the analog AM quality.
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公开(公告)号：JP2000324183A
公开(公告)日：2000-11-24
申请号：JP2000089509
申请日：2000-03-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LOU HUI-LING , SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: PROBLEM TO BE SOLVED: To treat an adjacent channel interference by including the information different from the display other than the digital displays into the information included in one of digital displays which include the signal information and transmitting every display via its allocated frequency band. SOLUTION: A C stream showing the minimum core audio information is transmitted via a sub-band 303 that is set between (fc-5) kHz and (fc+5) kHz and has resistance to a 2nd adjacent channel interference. An E1 stream showing the 1st strengthened audio information is transmitted via a sub-band 305 set between (fc-15) kHz and (fc-5) kHz, and an E2 stream showing the 2nd strengthened audio information is transmitted via a sub-band 307 set between (fc+5) kHz and (fc+15) kHz. Both E1 and E2 streams suffer the 2nd adjacent channel interference. The minimum core audio information is strengthened by the E1 or E2 stream according to whether the sub-bands 305 and 307 are significantly affected by the 2nd adjacent channel interference or not.
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Patent Agency Ranking
公开(公告)号：JP2000134179A
公开(公告)日：2000-05-12
申请号：JP27781099
申请日：1999-09-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: PROBLEM TO BE SOLVED: To protect an error with respect to information bits of a different class, even when a same CPPC code pair is in use by dividing audible frequency information bits into n-sets of classes based on error sensitivity and assigning bits of each class, so that a class of the bits whose error sensitivity is highest is transmitted through a channel most immune to the effect of interference. SOLUTION: An audible frequency packet from an audible frequency coder 210 is fed to a classification device 212, that converts its packet into a respective bit stream, corresponding to n-sets of different classes in audible frequency information bits. The classification device 212 assigns bit for each class to any of available channels so that the class of the bit most sensitive to an error can be transmitted through a channel most immune to interference. The classification device 212 applies respective bit streams to one-set of channel coder 214. An output therefrom is fed to one-set of interleaver 215.
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公开(公告)号：JP2001209399A
公开(公告)日：2001-08-03
申请号：JP2000368899
申请日：2000-12-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN
Abstract: PROBLEM TO BE SOLVED: To provide a device and a method to process signals including first and second components. SOLUTION: The device that processes signals including first and second components consists of a processor which takes out coefficients describing the phase relationship between the first and the second components and a controller which generates the display of the signals. The display includes first information taken out from the first component and second information related to the coefficients. The values of the second components are predicted based on the first and the second information.
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公开(公告)号：JP2000236263A
公开(公告)日：2000-08-29
申请号：JP2000018338
申请日：2000-01-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: PROBLEM TO BE SOLVED: To obtain a method for common encoding for the purpose of multi- program transmission by assigning a large rate of usable bits for a specified time interval to a program which has a high important scale value at the specified time interval. SOLUTION: A common multi-program coder decides the important scale value at the specified time interval as to the parts of bit streams from N sets of programs. Then the common multi-program coder assigns a pool of usable bit to the program according to the decided important scale value and assigns a large rate of usable bits for the specified time interval to the program having the high important scale value at the specified time interval. For example, a common multi-program audio coder 10 includes a PAC encoder bank 12, composed of PAC audio coders ENC-1 to ENC-N and a two-dimensional common bit allocator 14.
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公开(公告)号：JPH11317675A
公开(公告)日：1999-11-16
申请号：JP2919399
申请日：1999-02-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: PROBLEM TO BE SOLVED: To perform uneven error protection to bits of different classes to be encoded by dividing audio data bits into classes, based on the effects of errors of the data bits set on the perceptual quality of audio signals, which are reconfigured from an audio and by securing coincidence between the error protection given to the audio data bits and error sensibility. SOLUTION: First, 2nd and 3rd codes are used at a control part 10i (class 1 bit), an audio data part 12i of level 1 (class 2 bit) and an audio data part 14i of level 2 (class 3 bit) of a PAC audio packet (i) respectively. The class 1 bit is most important and therefore protected by a code of a low rate, and the bits of classes 2 and 3 are less important in this order and therefore protected by the codes having higher rates in this order. Thus, error protection of different levels are provided to those levels respectively.
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10.发明专利
公开(公告)号：JP2001237806A
公开(公告)日：2001-08-31
申请号：JP2000381197
申请日：2000-12-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LANEMAN JERRY NICHOLAS , SINHA DEEPEN , SUNDBERG CARL-ERIK WILHELM
Abstract: PROBLEM TO BE SOLVED: To provide a transmission technology for digital audio information and other information by which enhanced performance capability is attained in a digital audio broadcast(DAB) system. SOLUTION: A channel code can include an external channels code such as a cyclic redundancy code(CRC) and an internal channel code such as a complementary punctured pair convolution(CPPC) code. Many code words of an external code are related to a given packet of digital information according to a specific external code configuration in order to provide partial error flagging to different parts of the given packet in this invention. An information encoder such as a PAC encoder interacts with an external code encoder to decide bit assignment for packet transmission at a specific bit rate on the basis of at least partially an external code configuration.
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