摘要:
When a packet data is transmitted, a sync pattern comprising ‘q’ words (‘q’=m+n) is added to the data. The ‘q’ words is formed by combining a fixed pattern comprising ‘m’ words (‘m’ is an integer greater than 0) with plural types of variable patterns each comprising ‘n’ words (‘n’ is an integer greater than 1). In this case, a bit structure included in at least two consecutive packets should include different types of variable patterns.
摘要翻译:当发送分组数据时,将包括'q'个字('q'= m + n)的同步模式添加到数据。 通过将包括“m”个字('m'是大于0的整数)的固定模式与包括'n'个字的多种类型的可变模式组合('n'是大于1的整数)来形成'q' )。 在这种情况下,包括在至少两个连续分组中的比特结构应当包括不同类型的可变模式。
摘要:
This invention presents an apparatus for composing an ATM wrapper transmission block capable of handling plural pieces of program information transmitted in SDTI or IP packet commonly by a low overhead. Since the ATM wrapper transmission block conforms to both AAL1 system and AAL5 system, sequential connection is possible by changing over the AAL1 transmission and AAL5 transmission in the ATM wrapper layer. Further, by the AAL5 system, live transmission output of minimum transmission delay, and contribution output free from error can be issued at the same time, and therefore the error is corrected by referring to the reception data in the former, and the error is corrected by re-sending the error position data in the latter.
摘要:
There is disclosed a packet transmission apparatus for transmitting in a packet form a transmission unit including a data string arranged so as to divide predetermined data into a plurality of blocks, each block having a fixed length, block information for specifying the block type being added to each block. A DIF data processing circuit generates a transmission header having a new identifier by deleting predetermined redundancy information from the block information belonging to the plurality of blocks based on inputted data string, and then, generates a transmission unit having the generated transmission header. Next, a transmission terminal unit transmits the generated transmission unit by way of a transmission line. In this case, the DIF data processing circuit generates a new identifier by making the information of one block represent the information of the plurality of blocks to generate a transmission header having the generated identifier, or making the information of one block represent the information of an identical block or deleting the redundancy information including at least one of reserved data and invalid data.
摘要:
A communications system has a real time signal generating part for generating the real time signal of data rate R with one frame as one unit; a transmission part, having a transmission rate C (C>R), over which the real time signal is transmitted; and a real time signal outputting part for outputting the real time signal stored in a real time signal receive buffer part, wherein after storing the real time signal for a prescribed number, N, of frames in the real time signal receive buffer part, the real time signal outputting part is activated, thereby performing control so that all generated portions of the real time signal can be output at the receiving end without interruption.
摘要:
A digital data delivery system that delivers video data of a content and audio data of the same content respectively to a first receiver and a second receiver, which are independent of each other, to reproduce the video data and the audio data at the first and second receivers in such a manner as to secure synchronous reproductions between the two data. The digital data delivery system includes a transmission server which delivers a video data packet and a video synchronization signal packet to the first receiver and an audio data packet and an audio synchronization signal packet which indicates a time on the same reference time axis as that of the video synchronization signal packet to the second receiver, the first receiver which adjusts a clock signal based on the video synchronization signal packet and reproduces the video data packet based on this clock signal, and the second receiver which adjusts a clock signal based on the audio synchronization signal packet and reproduces the audio data packet based on this clock signal.
摘要:
A noise reduction device including a noise detection microphone including a high-frequency noise detection microphone and a low-frequency noise detection microphone for respectively detecting a high-frequency noise and a low-frequency noise generated from a noise source; a noise control unit for generating a control sound signal for cancelling a noise detected by the noise detection microphone in a control center of control space; and a loudspeaker for outputting a control sound based on the control sound signal from the noise controlling unit. The high-frequency noise microphone is disposed in a vicinity of a head portion of a user in a state in which directivity in an opposite direction with respect to the control center is added, and the low-frequency noise detection microphone is disposed outside of a sound-insulating wall.
摘要:
To reduce an amount of image data to transmit, and thereby achieve efficient utilization of a data transmission line, only coarse image information containing at least DC components of compressed image data stored in compressed form in a video server is transferred into a personal computer for display, and based on the displayed image, an editor performs edit work on the image of interest and produces additional information relating to the image.
摘要:
A noise reduction device, including a microphone for detecting noise, a noise controller for reversing the phase of noise detected by the microphone based on information outputted from the microphone, and a speaker for outputting sound based on information outputted from the noise controller, is arranged at a seat surrounded by a shell portion having a cavity, wherein a speaker is disposed in the cavity of the shell portion.
摘要:
A content upload system includes: a content distributing server that is installed in an airplane and distributes audio-video contents into the airplane; and a plurality of content accumulating servers that are installed in a plurality of airports, in which the airplane is parked, and transmit the audio-video contents to the content distributing server through a network. The content distributing server selectively writes audio-video contents that have not been stored in the content distributing server of audio-video contents transmitted from the content accumulating server while the airplane is parked on the airport.
摘要:
It includes a microphone for detecting noise emitted from a noise source, a noise controller for generating control sound signal to reduce noise detected by the microphone based on information from the microphone, and a speaker for outputting control sound based on control sound signal from the noise controller, wherein a plurality of microphones and speakers are arranged for each seat, and a plurality of microphones are arranged in higher density for each seat in a specific direction.