摘要:
A method for generating a stereoscopic video stream includes composite images having pixels related to a right and a left image of a tridimensional video content; the pixels of the right and left images are inserted into a composite image of the stereoscopic video stream, all the pixels of the right and left images are inserted in the composite image by leaving one of said two images unaltered and breaking up the other one into regions including a plurality of pixels and entering the regions into the composite image; the composite image has larger dimensions than those necessary to allow the insertion of all pixels of the left and right images, and in the pixels of the composite image left after such insertion a depth map is inserted, whose elements correspond to the pixel depth of the tridimensional content.
摘要:
A video stream composed of combined video frames having a first resolution and include in their entirety two contents usable through extraction from the aforesaid video frame: a first content belonging to a video stream (F1) at a second resolution lower than the first resolution of the frame; and, in the area of the frame formed by the remaining pixels, at least a second content belonging to an information stream (F2) having, in the case where it is also a video stream, a resolution equal to or less than the second resolution, where during the fruition of one of the two video streams it is shown full-screen in its entirety, or in the case of a data information stream, data encoded via a set of pixels, the number of which is less than or equal to the number of pixels left free by the first video stream.
摘要:
A method for reducing the probability of the loss of a character in a digital transmission employing biphase coding which comprises the steps of identifying the bits out-of-code, that is the bits which don't correspond to the two biphase code configurations; complementing the logic value said bits are given by the demodulator, if there is parity error; inhibiting a character not comprising out-of-code bits, but in which parity error occurs or if two or more out-of-code bits are present in the character. The circuit implementing the method comprises shift register means for storing the information bits and control signals identifying the out-of-code bits; parity check means; complementing means for complementing the logic state which are given by the demodulator to the out-of-code bits, said complementing means being conditioned by the simultaneous occurrence of the out-of-code bit and the parity error in a character; logic means for inhibiting the character in presence of parity error alone or of two or more out-of-code bits.
摘要:
In order to improve the quality of color television signals for broadcasting via satellite, the signals are transmitted on two of the channels available for transmission via satellite according to the rules established by CCIR. In the case of transmission by means of a compatible system, the NTSC, PAL or SECAM signal is transmitted on the first of the two channels and on the second channel there are transmitted the baseband R-Y and B-Y signals at from 0 to about 3 MHz sequentially on alternate lines and up to the limit of the video band the high frequency components of the luminance signal. In the case of transmission by means of a non-compatible system, there is transmitted on the first channel the luminance information in the whole available band and on the second channel the chrominance information R-Y and B-Y in the whole available band according to the following two alternatives: (1) the information is transmitted by means of a time division multiplex in which the first half of the active line is transmitted in one of the chrominance components and the second half in the other component; (2) the information is transmitted by means of a frequency sharing multiplex in which one of the components is transmitted in baseband, i.e. from 0 to about 3 MHz, and the other component is transmitted on an amplitude modulated subcarrier with single side band or vestigial band.
摘要:
A process for transmitting at least one alarm signal from an alarmed apparatus to a PSAP (Public Safety Answering Point, 127), through a system composed of a plurality of cooperating apparatuses (101, 104, 108, 106, 116, 119, 111, 124, 122) includes at least one such alarmed apparatus (101) and at least one responding apparatus, the apparatuses being equipped at least with memory, a processor and a first radio system for direct reception/transmission, from apparatus to apparatus, of signals and data, and the plurality of cooperating apparatus including at least one apparatus (124, 122) equipped with components adapted to transmit the alarm signal to the PSAP (127). An apparatus is also described which is adapted to implement the above process.
摘要:
A process for transmitting at least one alarm signal from an alarmed apparatus to a PSAP (Public Safety Answering Point, 127), through a system composed of a plurality of cooperating apparatuses (101, 104, 108, 106, 116, 119, 111, 124, 122) includes at least one such alarmed apparatus (101) and at least one responding apparatus, the apparatuses being equipped at least with memory, a processor and a first radio system for direct reception/transmission, from apparatus to apparatus, of signals and data, and the plurality of cooperating apparatus including at least one apparatus (124, 122) equipped with components adapted to transmit the alarm signal to the PSAP (127). An apparatus is also described which is adapted to implement the above process.