Advb sending control circuit and its realization method

Abstract

The invention relates to an ADVB sending control circuit and an implementation method. The ADVB sending control circuit comprises a sending control unit, a receiving line buffer area, a receiving line buffer management register, a current line number register, an image data label register, a video image configuration unit and a CRC calculation unit. The sending control unit is used for reading and maintaining line image data in the receiving line buffer area, performing framing processing, data judging, container organizing and ADVB framing work on the line image data and establishing a sent data error processing mechanism. According to the ADVB sending control circuit and the implementation method, framing, packaging and processing of video image data can be achieved through hardware, and the sending delay minimality of the video image data can be guaranteed; receiving and processing of video images with different formats can be self-adapted; the error data processing mechanism is supplied, and therefore the validity and the continuity of an ADVB data frame of a submitted link can be guaranteed.

Description

technical field

[0001] The invention belongs to computer communication technology, and relates to an ADVB sending control circuit and a realization method. Background technique

[0002] The ADVB (Aviation Digital Video Bus) protocol provides standards and means for realizing high-speed video transmission based on FC in the avionics system. Since the communication topology defined by the ADVB protocol is point-to-point one-way transmission, there is no processing mechanism such as error detection and retransmission on the link, and ADVB supports line-by-line image buffering and line-by-line display. Errors will inevitably lead to confusion in the process of container organization at the sending end, and the error will spread to the ADVB receiving end through the data frames submitted to the ADVB link, eventually leading to disorder in the recovered video image data.

[0003] Therefore need a kind of ADVB transmission control circuit and control method, meet ADVB data transmi...

Examples

Embodiment Construction

[0055] The sending control unit realizes the reading and maintenance of the line image data in the receiving line buffer based on the receiving line buffer management register; realizes the framing processing of the line image data through the video image configuration unit and the relevant information in the current line number register Data judgment, container organization and ADVB framing work; establish a sending data error handling mechanism, design a sending control state machine, and send the control logic under the control of the state machine to realize the identification, judgment and processing of the image data of the current row to be sent, and ensure the submission The correctness and continuity of the ADVB data frame to the link; finally submit the ADVB frame data to be sent to the CRC calculation unit.

[0056] First, the ADVB transmission control circuit is introduced, such as figure 1 Shown:

[0057] The video image configuration unit stores the relevant att...

technical field

[0001] The invention belongs to computer communication technology, and relates to an ADVB sending control circuit and a realization method. Background technique

[0002] The ADVB (Aviation Digital Video Bus) protocol provides standards and means for realizing high-speed video transmission based on FC in the avionics system. Since the communication topology defined by the ADVB protocol is point-to-point one-way transmission, there is no processing mechanism such as error detection and retransmission on the link, and ADVB supports line-by-line image buffering and line-by-line display. Errors will inevitably lead to confusion in the process of container organization at the sending end, and the error will spread to the ADVB receiving end through the data frames submitted to the ADVB link, eventually leading to disorder in the recovered video image data.

[0003] Therefore need a kind of ADVB transmission control circuit and control method, meet ADVB data transmi...

Examples

Embodiment Construction

[0055] The sending control unit realizes the reading and maintenance of the line image data in the receiving line buffer based on the receiving line buffer management register; realizes the framing processing of the line image data through the video image configuration unit and the relevant information in the current line number register Data judgment, container organization and ADVB framing work; establish a sending data error handling mechanism, design a sending control state machine, and send the control logic under the control of the state machine to realize the identification, judgment and processing of the image data of the current row to be sent, and ensure the submission The correctness and continuity of the ADVB data frame to the link; finally submit the ADVB frame data to be sent to the CRC calculation unit.

[0056] First, the ADVB transmission control circuit is introduced, such as figure 1 Shown:

[0057] The video image configuration unit stores the relevant att...

Images