CN202841366U - High definition video device based on loongson CPU - Google Patents

Abstract

The utility model relates to a high definition video device based on a loongson CPU. The high definition video device comprises the loongson CPU, a north bridge chip RS780E, a south bridge chip SB710, a video coding and decoding chip BCM70010, a video display chip SM750 and a DMA controller, wherein the north bridge chip RS780E is respectively connected with the loongson CPU, the south bridge chip SB710 and the video display chip SM750, the DMA controller is connected with the loongson CPU, and the video coding and decoding chip BCM70010 is connected with the south bridge chip SB710. According to the high definition video device, by arranging the video coding and decoding chip and the video display chip, a function of a high precision VGA display card in X86 market is realized by the loongson CPU, the high definition video device can only be used for sending and receiving commands through the loongson CPU, and real video playing tasks are shared by the video coding and decoding chip and the video display chip, work load of the loongson CPU is reduced to the maximum degree, and thereby other application operation capabilities of the loongson CPU are improved.

Description

A kind of high sharpness video device based on Godson CPU

Technical field

The utility model belongs to MultiMedia Field, is specifically related to a kind of high sharpness video device based on Godson CPU.

Background technology

The difficult situation of Chinese high-performance server field centreless has been broken in the appearance of No. 3 serial CPU of Godson, China IT industry band on a new height.But the problem that next faces a sternness is exactly the Industrialization of CPU, if solve the problem of bad industrialization, it can not practicality be the CPU of concept meaning that Godson CPU is still one, can only stop under lab.Because the time that No. 3 serial CPU of Godson emerge is short, so the equal imperfection of various supporting application schemes.The video displaying scheme that lacks high definition is an important problem of restriction Godson CPU development, if Godson CPU does not solve the demonstration problem of high definition, just can't use widely in PC market and personal terminal market.

The Godson CPU displaying scheme adopts two kinds mostly at present: the one, and adopt and articulate Embedded VGA IC at South Bridge chip PCI bus or north bridge PCIEbus; The 2nd, the VGA Presentation Function that relies on north bridge to carry solves.But this mode is existent defect all, does not reach the requirement of high sharpness video function.

The problem that the 1st kind of scheme exists is: the function of embedded VGA IC is very simple, can only realize simple demonstration, can't present high-resolution image, running game, when playing the film of 720p and 1080p form very slowly;

The problem of the 2nd kind of scheme existence is: the price that north bridge carries professional VGA video card is higher, can't adapt to the high-quality requirement of low price in market.Present way can only be explained by simulation program the binary code of operation north bridge VGA, retardation displaying time, make the large heavy discount of north bridge VGA Presentation Function.Another reason is exactly that this displaying scheme needs Godson CPU to bear the encoding and decoding task of a part of video, take the resource of CPU, so Godson CPU also will be taken into account the encoding and decoding task of video when other program of operation, make the playing fluency of VGA video greatly limited.

Except above-mentioned two schemes, can also insert the VGA video card that performance is powerful in the market at PCIE bus, but its major defect also is that Godson CPU is when other tasks of operation, there are not enough Godson CPU resources or ability to bear the coding and decoding video task that originally belongs to the Godson CPU part, so need to finish the coding and decoding video task by the other technologies means, discharge Godson CPU with this, when realizing HD video, can also move other program by Godson CPU.

The utility model content

For the defects of prior art, the purpose of this utility model is to propose a kind of cheap, high sharpness video device based on Godson CPU that can alleviate the Godson CPU live load.

High sharpness video device of the present utility model is achieved by the following technical solution:

A kind of high sharpness video device based on Godson CPU, comprise Godson CPU, north bridge chips, South Bridge chip, coding and decoding video chip BCM70010, video display chip SM750 and dma controller, described north bridge chips links to each other with Godson CPU, South Bridge chip and video display chip SM750 respectively, described dma controller links to each other with Godson CPU, and described coding and decoding video chip BCM70010 links to each other with South Bridge chip.

Further, this device comprises the memory that is connected with Godson CPU, carries out video data after the encoding and decoding by described memory stores through the coding and decoding video chip.

Further, described South Bridge chip is connected with the coding and decoding video chip by the PCI passage.

Further, described north bridge chips is connected with South Bridge chip with video display chip respectively by the PCIE passage.

Further, described Godson CPU links to each other with north bridge chips by the HT bus.

Further, described north bridge chips adopts RS780, RS780C, RS780D, RS780E, RS780G, RS780M, RS780MC, RX781, RS785G or RD790 chip.

Further, described South Bridge chip adopts SB700, SB710, SB750 or SB600 chip.

The beneficial effects of the utility model are:

1) this video-unit is for the problem of present Godson CPU high definition scheme existence, dexterously VGA high definition scheme is divided into two parts task: the one, VGA encoding and decoding task: namely the coding and decoding video chip directly reads vision signal from peripheral hardware by South Bridge chip, and vision signal is carried out encoding and decoding; The 2nd, VGA shows task: namely the data of video display chip after with the encoding and decoding that receive are converted to the RGBHV signal.This video-unit has been realized high definition VGA video card function on the present X86 market by above-mentioned two-part effective linking, make the user be no longer dependent on external high-end specialty products, can reach by free usefulness or the general-purpose chip of licensing the effect of high sharpness video.

2) this video-unit only sends and receives order by Godson CPU, and real video playback task distributes to the frequency codec chip and video display chip is born, farthest alleviate the live load of Godson CPU, thereby strengthened the operational capability of Godson CPU to other application.

Description of drawings

Fig. 1 is the structure principle chart of the utility model high sharpness video device embodiment.

Embodiment

Below in conjunction with accompanying drawing to the high sharpness video device of the utility model based on Godson CPU.

As shown in Figure 1, high sharpness video device in this example mainly comprises Godson CPU, South Bridge chip, north bridge chips, coding and decoding video chip, video display chip and the dma controller that is positioned at the dotted line frame, north bridge chips carries the PCIE passage, it links to each other with video display chip by the PCIE passage, also link to each other with South Bridge chip by the PCIE passage, i.e. A_Link bus among Fig. 1; South Bridge chip links to each other with Video Codec by the PCI passage, and its effect is the video file that receives from peripheral hardware; North bridge chips links to each other with Godson CPU by the HT bus, and Godson CPU also is connected with memory and dma controller.Godson CPU in this example is born the effect of mutual control command, does not need to carry out the conversion of coding and decoding video and follow-up display.

Godson CPU recited above, South Bridge chip, north bridge chips have consisted of the Godson platform, also can be with dma controller and memory on this platform, and wherein, Godson CPU can adopt No. 3 serial CPU of Godson, comprises Godson 3A, 3B, 3C.North bridge chips can adopt following arbitrary model chip: the RS780 of AMD, and RS780C, RS780D, RS780E, RS780G, RS780M, RS780MC, RX781, RS785G or RD790 in Fig. 1, illustrate with the RS780E chip.South Bridge chip can adopt following arbitrary model chip: the SB700 of AMD, and SB710, SB750 or SB600 in Fig. 1, illustrate with the SB710 chip.

Coding and decoding video chip recited above and video display chip have been finished the high definition solution: the coding and decoding video chip can adopt the BCM70010 of Broadcom company, is connected to South Bridge chip by PCI bus; Video display chip can adopt the SM750 of SiliconMotion company, is connected on the north bridge chips by PCIE bus.

The workflow of this video-unit can realize as follows:

The first step: when Godson CPU detects video file on the peripheral hardware (such as hard disk, USB flash disk), remember corresponding video file sign, but do not read;

Second step: Godson CPU sends the order of carrying out coding and decoding video to the coding and decoding video chip, and corresponding video file sign is reached the coding and decoding video chip, gives simultaneously task ID of this command id.Can find out that Godson CPU do not bear the coding and decoding video task, move other application programs and vacate valuable resource;

The 3rd step: the coding and decoding video chip is by the DMA(direct memory access) the function encoding and decoding are from the video file of peripheral hardware, be that Godson CPU sends the direct memory access order to dma controller, directly read video file from peripheral hardware by dma controller control coding and decoding video chip, and video file is carried out encoding and decoding process, the video data after the encoding and decoding can be delivered in the memory and preserve;

The 4th step: the video data of coding and decoding video chip after with encoding and decoding reaches video display chip, transmits simultaneously this task ID.

The 5th step: video display chip converts the video data that shows to corresponding RGBHV signal (i.e. redness, green, blueness, row signal, field signal) and issues display and broadcast;

The 6th step: the signal that the video display chip loopback is finished to the Godson CPU video, and with the corresponding position of this task ID assignment shows that this coding and decoding video task finishes.After Godson CPU receives this task ID number, namely think the playing task of having finished this video.

Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; in conjunction with above-described embodiment the utility model is had been described in detail; those of ordinary skill in the field are to be understood that: those skilled in the art still can make amendment or are equal to replacement embodiment of the present utility model, but these modifications or change are all among the claim protection range that application is awaited the reply.

Claims (7)

1. high sharpness video device based on Godson CPU, it is characterized in that: this device comprises Godson CPU, north bridge chips, South Bridge chip, coding and decoding video chip BCM70010, video display chip SM750 and dma controller, described north bridge chips links to each other with Godson CPU, South Bridge chip and video display chip SM750 respectively, described dma controller links to each other with Godson CPU, and described coding and decoding video chip BCM70010 links to each other with South Bridge chip.

2. video-unit as claimed in claim 1, it is characterized in that: this device comprises the memory that is connected with Godson CPU, carries out video data after the encoding and decoding by described memory stores through the coding and decoding video chip.

3. video-unit as claimed in claim 1 or 2 is characterized in that: described South Bridge chip is connected with the coding and decoding video chip by the PCI passage.

4. video-unit as claimed in claim 1 or 2 is characterized in that: described north bridge chips is connected with South Bridge chip with video display chip respectively by the PCIE passage.

5. video-unit as claimed in claim 1 or 2 is characterized in that: described Godson CPU links to each other with north bridge chips by the HT bus.

6. video-unit as claimed in claim 1 or 2 is characterized in that: described north bridge chips employing RS780, RS780C, RS780D, RS780E, RS780G, RS780M, RS780MC, RX781, RS785G or RD790 chip.

7. video-unit as claimed in claim 1 or 2 is characterized in that: described South Bridge chip employing SB700, SB710, SB750 or SB600 chip.

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