摘要:
This invention discloses an AM stereo transmission method characterized in that when left and right audio signals L and R are transmitted as an AM stereo signal which is represented by S=A cos(.omega.t+.phi.) wherein A denotes an amplitude, .omega. a carrier angular frequency and .phi. a phase angle given by tan.sup.-1 (L-R)/1+L+R, the audio signal of low frequency is transmitted at an amplitude A=(1+L+R), and the audio signal of high frequency is transmitted at an amplitude A=.sqroot.(1+L+R).sup.2 +(L-R).sup.2. The modulator according to the present invention comprises a matrix circuit for providing signals (L+R) and (L-R), an orthogonal modulator to produce an AM stereo signal .sqroot.(1+L+R).sup.2 +(L-R).sup.2 cos(.omega.t+.phi., an amplitude controller, an amplitude control signal generator circuit and a low-pass filter. In the modulator the said AM stereo signal S is changed to the signal (1+L+R)cos(.omega.t+.phi.) for audio signal of low frequency by controlling the amplitude controller. The demodulator according to the present invention comprises an amplitude controller to which the AM signal S=A cos(.omega.t+.phi.) is inputted, an orthogonal demodulator, an matrix circuit for driving signals L and R from signals (L+R) and (L-R) obtained by the orthogonal demodulator, an amplitude control signal generator circuit and a low-pass filter. In the demodulator the said AM stereo signal S=(1+L+R)cos(.omega.t+.phi.) for audio signal of low frequency is changed to the signal .sqroot.(1+L+R).sup.2 +(L-R).sup.2 cos(.omega.t+.phi.) by controlling the amplitude controller.
摘要翻译:本发明公开了一种AM立体声传输方法,其特征在于当左和右音频信号L和R作为AM立体声信号发送时,其由A表示振幅,ω表示载波角度的ω= A cos(ω+ t + phi) 频率和相位角由tan-1(LR)/ 1 + L + R给出,低频音频信号以幅度A =(1 + L + R)发送,高频音频信号为 以1 = 2ROOT(1 + L + R)2+(LR)2的幅度发送。 根据本发明的调制器包括用于提供信号(L + R)和(LR)的矩阵电路,正交调制器以产生AM立体声信号2ROOT(1 + L + R)2+(LR)2 cos(ω t + phi,幅度控制器,幅度控制信号发生器电路和低通滤波器,在调制器中,所述AM立体声信号S被改变为用于音频信号的信号(1 + L + R)cos(ω+ t + phi) 根据本发明的解调器包括输入AM信号S = A cos(ω-t + phi)的幅度控制器,正交解调器,用于驱动信号L和R的矩阵电路 由正交解调器获得的信号(L + R)和(LR),振幅控制信号发生器电路和低通滤波器,在解调器中,所述AM立体声信号S =(1 + L + R)cos t + phi)变为信号2ROOT(1 + L + R)2+(LR)2 cos(ω t + phi)。
摘要:
Disclosed is a flame retardant polyamide composition having desirable mechanical, electrical and processing properties, and therefore, being useful for producing parts of electric and electronic devices and appliances. The composition comprises a polyamide resin matrix and 1 to 40%, based on the weight of the polyamide matrix, of a flame-retarding agent in the form of fine particles dispersed in the matrix. The composition is characterized in that the flame-retarding agent consists of at least one member selected from:(A) crystals of addition salts of cyanuric acid or isocyanuric acid with melamine, and;(B) mixed crystals of addition salts of cyanuric acid or isocyanuric acid with a mixture of melamine and acetoguanamine in an amount by mole not larger than that of the melamine.
摘要:
The output voltage of an AM synchronous detector is compared with a reference potential level by a voltage comparator. A muting device connected with the output of the detector is controlled by a control circuit connected with the comparator. Through this control circuit, the detector output is immediately muted when the detector output level falls below the reference potential level, and the muting of the detector output is removed after a predetermined retardation when the detector output level exceeds the reference potential level.
摘要:
The present invention intends to provide an IL-6R.IL-6 fusion protein and the like in which IL-6R and IL-6 are directly linked without a linker.The IL-6 receptor.IL-6 fusion protein of the present invention has a structure in which one amino acid residue constituting IL-6 receptor and one amino acid residue constituting IL-6 are directly bonded.
摘要:
An impact elastic wave test is conducted to measure propagating waves in a pipe to be examined, a frequency spectrum of the propagating waves is analyzed, and at least a spectral area value in a first frequency region and a spectral area value in a second frequency region of the frequency spectrum are evaluated, thereby determining a type of a deteriorated state of the buried pipe. A correlation relationship between a parameter obtained from a force-deformation relationship indicating a relationship between a force externally input to a sample pipe and a deformation of the sample pipe due to the force, and impact elastic wave test data obtained by conducting an impact elastic wave test with respect to the sample pipe is previously obtained, an impact elastic wave test is conducted with respect to a pipe to be examined to collect impact elastic wave measurement data of the pipe to be examined, and the actually measured impact elastic wave measurement data is evaluated based on the correlation relationship, thereby quantitatively determining a degree of deterioration of the pipe to be examined.
摘要:
An image processing device includes an inputting unit, an extracting unit, a reading unit and processing unit. The inputting unit converts, into a format which can be processed within the image processing device, and inputs, digitized document data for region designation that includes region information expressing a region which has been designated in advance in order to carry out a predetermined processing. The extracting unit extracts the region information from the document data for region designation and the reading unit reads a document image for carrying out the predetermined processing. The processing unit extracts, from the document image read by the reading unit, a region corresponding to the region information extracted by the extracting unit, and carries out the predetermined processing.
摘要:
An information processing method in which after various sorts of information such as voice, image, and moving picture are printed as embedding information on a printing medium such as paper, the embedding information is scanned to reproduce the embedding information in an optimum form thereof. In the information processing method, original information is inputted from an input apparatus, attribute information of the original information is inputted, the original information is combined with the attribute information in accordance with a correspondence relationship therebetween to thereby produce information to be embedded, embedding information is produced from the information to be embedded, the embedding information is printed on a recording medium, the embedding information is read-scanned to thereby input image information, the embedding information is recognized from the inputted image information, the recognized embedding information is resolved into the original information and the attribute information so as to determine an output apparatus used to reproduce the original information in accordance with the attribute information corresponding thereto, and the original information is outputted to the output apparatus.
摘要:
A novel input device and for an information processing system for carrying out a process on the basis of input data, the input device is disclosed. In the input device, the output unit develops instructive-document form information and outputs an instructive document to which an entry is not yet made by a user. The extracting unit extracts analysis information for analyzing an instructive document to which an entry has been made by the user from the instructive-document form information. The storing unit stores the extracted analysis information. The analyzing unit analyzes the information on the received instructive document after a user makes an entry to thereto while referring to the analysis information. With such an arrangement, the input device receives the information on the instructive document having entries made thereto, and inputs information obtained by the process of analyzing the received information to the information processing system.
摘要:
A recording apparatus includes a recording head which is scanned, a supply system containing an amount of ink and a detector for the residual ink quantity in the supply system. The residual ink quantity is detected by detecting deviation of a deviation member; this deviation occurs upon a change in pressure in an ink supply path in the ink supply system. The detection is performed after a predetermined time delay with respect to a signal relating to a change of scan direction or with respect to operation of a pump.
摘要:
A process for forming a container of acrylonitrile polymers by biaxial-orientation blow-molding a preform. A preform of thermoplastic resin, mainly acrylonitrile polymers, is irradiated with an electron beam or a gamma-ray. Immediately after the irradiation, the preform is heated at 40.degree. C. or higher to reduce residual acrylonitrile monomer in the preform to 0.1 ppm or less. Then, the preform is biaxial-orientation blow molded to form a container.