CN201107856Y - A digital medical video recording device - Google Patents

Abstract

The utility model discloses a digital medical video recording device, which comprises a device body and a video transmission interface circuit connected to the device body. The video transmission interface circuit is a serial digital interface circuit. The serial digital interface circuit includes an input circuit and an output circuit. The output circuit receives the video data output by the device body and performs parallel/serial conversion and then transmits it to the outside. The input circuit receives the video data transmitted from the outside and performs serial/parallel conversion. After conversion, it is sent to the device body. Because the digital medical video recording device of the present invention adopts a serial digital interface, the video transmission can realize the input and output of digital signals, without the need for digital-to-analog conversion, analog-to-digital conversion and other related signal processing, which will not affect the image quality. Loss and noise interference can be eliminated, so the quality of medical video recording and video playback is improved.

Description

A digital medical video recording device

【Technical field】

The utility model relates to a medical instrument, in particular to a digital medical video recording device.

【Background technique】

Medical video equipment is a device used in the medical field to record and playback video output from medical imaging equipment. During the use of imaging medical instruments, the output video of the instrument is often recorded for subsequent diagnosis or archiving. Therefore, special medical video recording equipment has appeared, such as medical DVD recorders, medical hard disk video recorders, etc. Due to the particularity of medical applications, the continuous pursuit of improving video quality is an important feature of the development of medical video technology. Digital medical video equipment uses digital media to record video, such as DVD discs and hard drives. However, traditional medical video recording equipment only has analog video interfaces, such as S-video interface, Video interface and so on. For digital medical video equipment, when the analog video interface is used, the video signal has undergone digital-to-analog conversion, analog-to-digital conversion and other signal processing processes during the transmission process. The signal loss is increased in the analog transmission, and the quality of the signal is affected. loss. At the same time, noise is introduced in the process, which further deteriorates the image quality.

【Content of invention】

The technical problem to be solved by the utility model is to provide a digital medical video recording device, which can improve the recording quality and output video quality of the medical video recording device.

In order to achieve the above object, the utility model adopts the following technical solutions:

A digital medical video recording device, comprising a device body and a video transmission interface circuit connected to the device body, the device video transmission interface circuit is a serial digital interface circuit (Serial Digital Interface, referred to as SDI).

Further, the serial digital interface circuit includes an input circuit and an output circuit, the output circuit receives the video data output by the device body and performs parallel/serial conversion and transmits it to the outside, and the input circuit receives the external transmission The video data is sent to the device body after serial/parallel conversion.

In a preferred manner, the output circuit includes a serializer and a driver sequentially connected in the direction of data transmission, the serializer is used to perform parallel/serial conversion on the output video data, and the driver is used to generate Transmission driving capability; the input circuit includes an equalizer and a deserializer sequentially connected in the direction of data transmission, the equalizer is used for frequency-domain weighting of the input serial video signal, and the deserializer is used for serial row data for serial/parallel conversion.

The serializer includes a parallel/serial conversion unit and a scrambling encoding unit, the parallel/serial conversion unit is used for parallel/serial conversion of video data, and the scrambling encoding unit is used for scrambling output serial data scrambling and encoding.

The deserializer includes a decoding and descrambling unit and a serial/parallel conversion unit, the decoding and descrambling unit is used for decoding and descrambling of input serial data, and the serial/parallel conversion unit is used for serial/parallel conversion of video data Parallel conversion.

The device body is provided with a BT.656 standard signal interface, and the serial digital interface circuit communicates with the device body through the BT.656 standard signal interface.

The BT.656 standard signal interface is a board-level interface.

It also includes a BNC (Bayonet Nut Connector) connector for connecting the serial digital interface circuit with an external transmission path.

The beneficial effects of the utility model are:

The digital medical video recording device of the present utility model adopts the SDI interface, since the video transmission using the SDI interface can directly carry out the input and output of digital signals, without the need for digital-to-analog conversion, analog-to-digital conversion and other related signal processing, avoiding analog transmission At the same time, the utility model can losslessly transmit the video data of the medical video output device to the digital medical video recording device to improve the video quality, and can also losslessly transfer the video content of the digital medical video recording device It is provided to medical video equipment to improve playback quality, and to ensure the consistency of video content and video source to the greatest extent, thus effectively improving the video quality and playback video quality of digital medical video equipment.

【Description of drawings】

Fig. 1 is a connection block diagram of a medical video recording device body and an SDI interface according to an embodiment of the present invention.

【Detailed ways】

The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

As shown in Figure 1, the digital medical video recording device of this embodiment includes a device body 1 and an SDI interface circuit 2, and the SDI interface circuit 2 consists of two relatively independent circuits of an SDI output circuit 21 and an SDI input circuit 22 (there is no 22 in the figure). composition. The device body 1 includes the core circuit of the digital medical video recording device, which is used to run the system software, perform audio and video codec processing, and is the source and destination of the data stream transmitted by the SDI interface circuit 2 . The SDI output circuit 21 and the SDI input circuit 22 are physically connected to the external transmission channel through SDI through BNC connectors B1 and B2 respectively.

In this embodiment, the SDI interface circuit 2 and the device body 1 are connected at the board level. The core circuit of the device body 1 is provided with a BT.656 standard signal interface, and one end of the SDI interface circuit 2 connected to the core circuit is connected to the BT.656 standard signal interface. The mating is realized on a printed circuit board (PCB). The board-level transmission of digital video data (that is, the transmission between chips) adopts the 10-bit or 8-bit parallel signal defined by the BT.656 standard. transmission.

The function of the SDI output circuit 21 is to convert the parallel BT.656 video signal output by the core circuit of the device body 1 into an SDI signal that meets the format and performance requirements, so as to be suitable for digital video data transmission between long-distance devices. The SDI output circuit 21 is mainly composed of two parts, namely a serializer 211 and a driver 212 . The serializer 211 converts the parallel data provided by the device body 1 into serial data for output, and includes a parallel/serial conversion unit and a scrambling encoding unit for scrambling and encoding the converted serial data. The driver 212 is used to generate the driving capability for long-distance transmission. Both the serializer 211 and the driver 212 can be implemented using existing dedicated chips.

The function of the SDI input circuit 22 is to convert the externally input SDI signal into a parallel BT.656 signal acceptable to the core circuit of the device body 1, so that the core circuit can perform subsequent processing such as compression and recording on the video input. The SDI input circuit 22 is mainly composed of two parts, namely an equalizer 221 and a deserializer 222 . The equalizer 221 is used to weight the input SDI signal in the frequency domain, and restore the serial signal transmitted over a long distance, so that the subsequent deserializer 222 can identify it without error. The deserializer 222 converts the input SDI serial data into parallel data and sends it to the device body 1. It includes a decoding and descrambling unit and a serial/parallel conversion unit for decoding and descrambling the input serial data. Both the equalizer 221 and the deserializer 222 can be implemented using existing dedicated chips.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (8)

1. the medical video recording equipment of numeral comprises apparatus body and the video transmission interface circuit that is connected on the apparatus body, it is characterized in that described video transmission interface circuit is the serial digital interface circuit.

2. the medical video recording equipment of numeral as claimed in claim 1, it is characterized in that, described serial digital interface circuit comprises input circuit and output circuit, described output circuit receives the video data of described apparatus body output and also does to transmit to the outside after parallel/serial conversion, and the video data that described input circuit reception external transmission is come is also done to send into described apparatus body after the serial conversion.

3. the medical video recording equipment of numeral as claimed in claim 2, it is characterized in that, described output circuit is included in serializer and the driver that transmission side data upwards connects in turn, described serializer is used for the video data of output is walked abreast/serial conversion, and described driver is used to produce the driving force that satisfies remote transmission; Described input circuit is included in equalizer and the deserializer that transmission side data upwards connects in turn, and described equalizer is used for the serial video signal of input is made frequency domain weighting, and described deserializer is used for serial data is carried out the serial conversion.

4. the medical video recording equipment of numeral as claimed in claim 3, it is characterized in that, described serializer comprises parallel/serial converting unit and scrambling coding unit, described parallel/serial converting unit is used for the parallel/serial conversion of video data, and described scrambling coding unit is used to export the scrambling and the coding of serial data.

5. the medical video recording equipment of numeral as claimed in claim 3, it is characterized in that, described deserializer comprises decoding descrambling unit and serial, described decoding descrambling unit is used for the decoding and the descrambling of input serial data, and described serial is used for the serial conversion of video data.

6. as any medical video recording equipment of described numeral of claim 1～5, it is characterized in that be provided with the BT.656 standard signal interface on the described apparatus body, described serial digital interface circuit is communicated by letter with apparatus body by described BT.656 standard signal interface.

7. the medical video recording equipment of numeral as claimed in claim 6 is characterized in that, described BT.656 standard signal interface is a plate level interface.

8. as any medical video recording equipment of described numeral of claim 1～5, it is characterized in that described equipment also comprises and is used for BNC connector that described serial digital interface circuit is connected with the external transmission path.

Images