Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus access regulation
Reexamination Certificate
1997-12-17
2001-02-13
Faile, Andrew I. (Department: 2711)
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus access regulation
C710S120000, C709S241000
Reexamination Certificate
active
06189060
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a transmitting device, a server device and a transmitting method, and is suitably applied to a video server device for transmitting video data.
2. Description of the Related Art
In a video server device, the processing for transmitting video data encoded by an encoder to a hard disk drive to record on a hard disk, and the processing, by reading out and transmitting the video data from the hard disk to a decoder, for decoding and outputting the video data, are conducted.
At this time, the video data is transmitted via a data bus such as a Versa Module European (VME) bus which connects a Central Process Unit (CPU), the hard disk drive, and each device of a video server device, i.e., an encoder, a decoder.
By the way, as the video server device having the above construction, the case of using the VME bus for transmission of video data has a problem that the transmission of video data takes a lot of time because the transmission speed of the VME bus is 50[MByte/s] degree even in maximum.
As methods of solving this, a method of newly planning and using a high-speed dedicated bus to transmit the video data can be considered. However, in this method the existing hard disk drive, encoder and decoder are not able to be connected, thereby an inconvenience occurs in general purpose.
Further, as a second solving method, a method of using a peripheral component interconnect (PCI) bus having the maximum transmission speed 133[MByte/s], which has recently developed as an internal bus of computer system, can be considered. However, since the PCI bus has developed as the internal bus of a computer system, the bus occupied time of the PCI bus is predetermined, so that the data having large volume of information such as video data can not be successively transmitted at once, thus an inconvenience that the video data can not be efficiently transmitted occurs.
Nevertheless, since the PCI bus has general purpose characteristic, if the point in that data can not be successively transmitted were solved, a data bus capable of high-speed transmitting video data and having general purpose characteristic would be realized; and a video server device capable of high-speed transmitting video data seems to be realized.
SUMMARY OF THE INVENTION
In view of the foregoing, an object of this invention is to provide a transmitting device capable of high-speed transmitting video data, a server device using it, and its transmitting method.
The foregoing object and other objects of the invention have been achieved by the provision of a transmitting device having a bus formed by multiple signal lines, a transmitter circuit for transmitting data by driving the bus, and a receiver circuit for receiving the data supplied via the bus. In the case of transmitting video data as data, the transmitter circuit invalidates the time out signal that is supplied by a timer for counting the occupied time of the bus to transmit the video data to the bus.
With this arrangement, when transmitting the video data, by invalidating the time out signal of the timer for counting the occupied time of the bus, the bus can be continuously used, and thus the video data having large volume of information can be successively and efficiently transmitted.
Furthermore, according to the present invention, in a transmitting method of transmitting video data via a bus, when utilizing the PCI bus as the bus to transmit video data, the time out signal that is supplied by a timer for counting the bus occupied time of the PCI bus is invalidated to transmit the video data to the PCI bus.
With this arrangement, when transmitting the video data, by invalidating the time out signal of the timer for counting the bus occupied time, the PCI bus can be continuously used, and thus the video data having large volume of information can be successively and efficiently transmitted.
The nature, principle and utility of the invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings in which like parts are designated by like reference numerals or characters.
REFERENCES:
patent: 5467295 (1995-11-01), Young et al.
patent: 5862353 (1999-01-01), Revilla et al.
patent: 5887194 (1999-03-01), Carson et al.
patent: 5911055 (1999-06-01), Whiteman et al.
Faile Andrew I.
Frommer William S.
Frommer Lawrence & Haug LLP.
Polito Bruno
Sony Corporation
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