CN111787360A - IP network-based streaming media coding and decoding equipment - Google Patents
IP network-based streaming media coding and decoding equipment Download PDFInfo
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- CN111787360A CN111787360A CN202010748444.9A CN202010748444A CN111787360A CN 111787360 A CN111787360 A CN 111787360A CN 202010748444 A CN202010748444 A CN 202010748444A CN 111787360 A CN111787360 A CN 111787360A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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Abstract
The invention relates to a stream media coding and decoding device based on an IP network, which comprises a transmitting end and a receiving end, wherein the transmitting end and the receiving end are respectively provided with an audio and video processing chip, a control chip, a memory, a main chip and a network exchange group, the audio and video processing chip is respectively connected with the control chip and the main chip, the main chip is also connected with the memory and the network exchange group, the transmitting end and the receiving end transmit audio and video data through the network exchange group, the network exchange group is provided with an Ethernet processing chip and an optical fiber receiving and transmitting chip and is provided with corresponding pin interfaces, the pin interface of the Ethernet processing chip is connected with the main chip through an MDI interface, and the pin interface of the optical fiber receiving and transmitting chip is connected with the main chip through. The main chip of the invention carries SDVoE technology, supports the 10G network switching group to distribute AV signals, and utilizes Ethernet to transmit through coding and decoding data streams, thereby not only ensuring the transmission quality of audio and video data, but also prolonging the transmission distance.
Description
Technical Field
The invention relates to the field of communication equipment, in particular to streaming media coding and decoding equipment based on an IP network.
Background
A codec device refers to a device capable of transforming a signal or a data stream, and includes both encoding or extracting the signal or the data stream to obtain an encoded stream for transmission, storage or encryption, and decoding or recovering the signal or the data stream from the encoded stream for observation or processing. The streaming media encoding and decoding technology refers to the technology of using streaming transmission technology to transmit continuous and real-time media data streams, such as audio data streams or video data streams, in a network, and is a combination of the network technology and the audio and video technology.
The existing streaming media coding and decoding equipment has the defects of short transmission distance and poor audio and video data transmission quality.
The above problems are worth solving.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides streaming media coding and decoding equipment based on an IP network.
The technical scheme of the invention is as follows:
the utility model provides a based on IP network streaming media coding and decoding equipment, its characterized in that, including transmitting terminal and receiving terminal, the transmitting terminal with the receiving terminal all is equipped with audio frequency and video processing chip, control chip, memory, main chip and network exchange group, audio frequency and video processing chip connects respectively control chip with the main chip, the main chip still connects the memory with network exchange group, the transmitting terminal with the receiving terminal passes through network exchange group transmission audio frequency and video data, network exchange group is equipped with ethernet processing chip and optic fibre transceiver chip to be furnished with corresponding pin interface, the pin interface of ethernet processing chip passes through MDI interface connection the main chip, the pin interface of optic fibre transceiver chip passes through XPI interface connection the main chip.
The invention according to the above scheme is characterized in that the transmitting end is provided with an HDMI input interface, the receiving end is provided with an HDMI output interface, the HDMI input interface inputs audio and video data signals, and the HDMI output interface outputs the audio and video data signals.
The present invention according to the above aspect is characterized in that the transmitter is provided with the HDMI ring-out output interface.
The invention according to the above scheme is characterized in that the transmitting end and the receiving end are both provided with an infrared output interface and an infrared input interface.
The invention according to the scheme is characterized in that the transmitting end and the receiving end are both provided with audio coding and decoding chips, the audio coding and decoding chips are connected with the main chip through an IIS bus or an SPI bus, and the type of the audio coding and decoding chips is WM 8731.
The invention according to the above scheme is characterized in that the ethernet processing chip is connected with an ethernet transformer, and the model of the ethernet transformer is AE-SD 24008.
The invention according to the above scheme is characterized in that the model of the ethernet processing chip is RTL8364, and the model of the optical fiber transceiver chip is AQR 113C.
The invention according to the above scheme is characterized in that the main chip is connected with a level conversion chip, and the model of the level conversion chip is SP 3232.
The invention according to the above scheme is characterized in that the main chips of the transmitting end and the receiving end are both provided with SPF + interfaces.
Preferably, the model of the audio/video processing chip is GSV2008, the model of the main chip is AVP2000T, the model of the control chip is LPC54606J256ET100E, and the model of the memory is W25Q 64.
The invention according to the scheme has the advantages that:
the main chip of the invention carries SDVoE technology, allows switching and expanding audio, video and control signals on standard Ethernet, supports a 10G network switching group to distribute AV signals, and utilizes Ethernet transmission by encoding and decoding data streams, thereby not only ensuring the transmission quality of audio and video data, but also prolonging the transmission distance, wherein the transmission distance can reach 2km in a single mode, and the transmission distance can reach 300m in a multi-mode, thus being beneficial to the design and layout of complicated video projects of engineering personnel;
furthermore, the transmitting end is also provided with an HDMI loop output interface, and the transmitting end and the receiving end are both provided with an infrared output interface and an infrared input interface, so that a user can conveniently control and debug the equipment in different places.
Drawings
FIG. 1 is a block diagram of the signal connections of the present invention.
Fig. 2 is a connection block diagram of a transmitting terminal in the present invention.
FIG. 3 is a connection block diagram of a receiving end in the present invention.
Detailed Description
For better understanding of the objects, technical solutions and effects of the present invention, the present invention will be further explained with reference to the accompanying drawings and examples. Meanwhile, the following described examples are only for explaining the present invention, and are not intended to limit the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features.
As shown in fig. 1 to fig. 3, an IP network-based streaming media encoding and decoding device includes a transmitting end and a receiving end, both the transmitting end and the receiving end are provided with an audio/video processing chip, a control chip, a memory, a main chip and a network switching group, the audio/video processing chip is connected to the control chip and the main chip respectively, the main chip is further connected to the memory and the network switching group, the transmitting end and the receiving end transmit audio/video data through the network switching group, the network switching group is provided with an ethernet processing chip and an optical fiber transceiver chip and is provided with corresponding pin interfaces, the pin interface of the ethernet processing chip is connected to the main chip through an MDI interface, the pin interface of the optical fiber transceiver chip is connected to the main chip through an XFI interface, and the XFI interface is suitable for 10 Gbps.
The audio and video processing chip is used for two-way audio extraction or embedding and picture scaling algorithm processing, the main chip is used for providing a processing platform carrying SDVoE (software defined video based on Ethernet) technology to realize data stream encoding and decoding, data transmission is carried out through a 10G network switching group and an optical fiber transceiving chip, the transmission distance is increased, and the transmission distance can reach 2km under a single mode and 300m under a multi-mode.
The main chip of the invention carries SDVoE technology, allows audio, video and control signals to be switched and expanded on standard Ethernet, supports 10G network switching and distribution AV signals, and receives or sends data by the optical fiber transceiver chip, wherein the model of the optical fiber transceiver chip is AQR 113C.
It should be noted that SDVoE technology is a widely adopted standardized solution for distributing and managing audio-video (AV) signals over an ethernet network that is readily available. SDVoE can easily manage complex tasks such as video routing, scaling, aspect ratio management, video wall processing, image synthesis, and audio mixing by providing solutions at each layer to handle a complete 7-layer OSI stack, creating a clean interface between hardware and software, ensuring interoperability, and providing AV device manufacturers with a unique platform for transmitting audio and video signals in a zero-latency IP protocol.
Further, the main chip used in the present invention provides the functions and advantages of seamless video switching, zero delay and high image quality.
The control chip in the equipment is used for sending a control signal according to the instruction and detecting the running state of the system through a detection signal; the memory in the device is used for storing, reading and writing parameters and codes.
Preferably, the model of the control chip is LPC54606J256ET100E, the model of the memory is W25Q64, the erasing period of the W25Q64 reaches 10W times, the data storage period of 20 years is achieved, the supporting voltage is 2.7-3.6V, the W25Q64 supports standard SPI and double-output/four-output SPI, and the maximum SPI clock can reach 80 Mhz.
In this embodiment, the transmitting end and the receiving end are both provided with Power modules and provide Power Over Ethernet (POE), that is, under the condition that the existing ethernet cat.5 wiring infrastructure is not changed, while transmitting data, dc Power can be provided for the device. Therefore, only one end of the power supply is required to be connected.
The invention also provides an SFP + interface which is used for connecting the 10G optical fiber module and can be communicated with other types of 10G modules, compared with the XFI interface, the XFI conforms to an XFI MSA protocol, the SFP + conforms to an IEEE 802.3ae protocol, an SFF-8431 protocol and an SFF-8432 protocol, the SFP + interface is only half of the XFI interface, and compared with the highest rate (4G) of the SFP, the highest rate of the SFP + can reach 10G.
In this embodiment, the ethernet processing chip is connected to the ethernet transformer, and preferably, the model of the ethernet processing chip is RTL8364, and the model of the ethernet transformer is AE-SD 24008. After the network transformer is used, the network transformer can be used for signal level coupling and external interference isolation, and impedance matching is realized, so that the transmission distance can be increased. Meanwhile, the chip is isolated from the outside, and the anti-interference capability is enhanced.
As shown in fig. 2 and fig. 3, in this embodiment, the model of the audio/video processing chip is GSV2008, the model of the main chip is AVP2000T, the model of the control chip is LPC54606J256ET100E, and the model of the memory is W25Q 64.
The transmitting terminal is equipped with HDMI input interface, and the receiving terminal is equipped with HDMI output interface, and HDMI input interface inputs audio and video data signal, and HDMI output interface outputs audio and video data signal, and the HDMI interface that this application scheme used supports HDMI2.0, and follows HDCP2.2, is suitable for transmission 4K @60HZ, chroma sampling degree 4: 4: 4 high definition data.
The transmitting terminal is also provided with an HDMI loop output interface, and a user can connect the display device at the transmitting terminal to watch videos, so that the user can conveniently debug and trim the transmitting terminal. The transmitting end and the receiving end are both provided with an infrared output interface and an infrared input interface, the bidirectional IR (infrared signal) transparent transmission function is realized, and the remote control and debugging of the equipment by a user are realized, namely the display equipment on the receiving end can be debugged or controlled at the transmitting end, and the signal source equipment on the transmitting end can be debugged or controlled at the receiving end.
The transmitting end and the receiving end are both provided with audio coding and decoding chips, the audio coding and decoding chips are connected with the main chip through an IIS bus or an SPI bus, and the type of the audio coding and decoding chips is WM 8731. The WM8731 is a powerful low-power consumption stereo 24-bit audio coding and decoding chip and has the characteristics of high-performance earphone drivers, low-power consumption design, controllable sampling frequency, selectable filters and the like. WM8731 contains 2 line inputs and 1 microphone input and can be volume adjusted, built-in on-chip ADC (analog to digital converter) and optional high pass digital filter, DAC (digital to analog converter) with high quality over-sampling rate architecture, line outputs and headphone outputs, built-in crystal oscillator and configurable digital audio interface, with 2 or 3 line optional microprocessor control interface.
IIS has 3 main signals: 1. a serial clock SCLK, also called a Bit Clock (BCLK), i.e. corresponding to each bit of the digital audio, SCLK having 1 pulse, SCLK having a frequency =2 × sampling frequency × number of sampling bits; 2. a frame clock LRCK for switching data of left and right channels, wherein an LRCK of "1" indicates that data of left channel is being transmitted, and an LRCK of "0" indicates that data of right channel is being transmitted, and the frequency of the LRCK is equal to the sampling frequency; 3. serial data SDATA, is audio data represented by two's complement.
The SPI communication works in a Master-Slave manner, having a Master device and one or more Slave devices, requiring at least 4 lines, namely MISO (Master Input Slave Output, i.e. Master data Input, Slave data Output), MOSI (Master Output Slave Input, i.e. Master data Output, Slave data Input), SCLK (serial clock, i.e. clock signal, generated by Master device) and CS (Chip Select, i.e. Slave enable signal, controlled by Master device).
The invention supports audio de-embedding and audio embedding, greatly reduces the transmission cost of video signals, improves the transmission quality of the audio signals, solves the problem of asynchronism in audio and video signal transmission, realizes audio and video lossless transmission, namely, satisfies the requirement that a user synthesizes external audio in the video or separates the embedded audio, increases the practicability of coding and decoding equipment, and can equip the video with proper background music on the spot according to the requirement.
The main chip is connected with a level conversion chip, the model of the level conversion chip is SP3232, mutual conversion of TTL level and 232 level is achieved, communication and intercommunication between the TTL level of the single chip microcomputer and the level of an RS232 serial port of a PC are achieved, and finally a transmitting end or a receiving end is locally connected with a PC terminal through an RS232 serial interface to complete operations such as equipment debugging.
The control mode of the invention is a computer operation user interface and GUI which are displayed in a graphic mode, thereby realizing a man-machine interaction control mode and bringing good user experience.
In summary, the SDVoE technology is carried on the main chip in the present invention, which allows switching and extension of audio, video and control signals on a standard ethernet, supports a 10G network switch group to distribute AV signals, and by encoding and decoding data streams, utilizes ethernet transmission, which not only ensures transmission quality of audio and video data, but also prolongs transmission distance, where the transmission distance can reach 2km in a single mode and 300m in multiple modes, thus facilitating engineering personnel to design and lay out complex video items.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A stream media coding and decoding device based on an IP network is characterized by comprising a transmitting end and a receiving end, wherein the transmitting end and the receiving end are respectively provided with an audio and video processing chip, a control chip, a memory, a main chip and a network switching group, the audio and video processing chip is respectively connected with the control chip and the main chip, the main chip is also connected with the memory and the network switching group, the transmitting end and the receiving end transmit audio and video data through the network switching group,
the network switching group is provided with an Ethernet processing chip and an optical fiber receiving and transmitting chip and is provided with a corresponding pin interface, the pin interface of the Ethernet processing chip is connected with the main chip through an MDI interface, and the pin interface of the optical fiber receiving and transmitting chip is connected with the main chip through an XFI interface.
2. The IP network based streaming media coding and decoding device according to claim 1, wherein the transmitting end is provided with an HDMI input interface, the receiving end is provided with an HDMI output interface, the HDMI input interface inputs audio and video data signals, and the HDMI output interface outputs audio and video data signals.
3. The IP-based network streaming media codec device of claim 1, wherein the transmitter is provided with the HDMI ring-out output interface.
4. The IP-based network streaming media codec device of claim 1, wherein the transmitting end and the receiving end are both provided with an infrared output interface and an infrared input interface.
5. The IP network-based streaming media coding and decoding device as claimed in claim 1, wherein the transmitting end and the receiving end are both provided with audio coding and decoding chips, the audio coding and decoding chips are connected to the main chip through IIS bus or SPI bus, and the type of the audio coding and decoding chip is WM 8731.
6. The IP-based network streaming media coding and decoding device according to claim 1, wherein the Ethernet processing chip is connected with an Ethernet transformer, and the type of the Ethernet transformer is AE-SD 24008.
7. The IP-based streaming media codec of claim 1, wherein the model of the ethernet processing chip is RTL8364, and the model of the optical fiber transceiver chip is AQR 113C.
8. The IP network-based streaming media coding and decoding device as claimed in claim 1, wherein the main chip is connected with a level shift chip, and the model of the level shift chip is SP 3232.
9. The IP-based network streaming media codec device of claim 1, wherein the main chips of the transmitting end and the receiving end are both provided with SPF + interfaces.
10. The IP network-based streaming media coding and decoding device as claimed in claim 1, wherein the audio/video processing chip is of a GSV2008 type, the main chip is of an AVP2000T type, the control chip is of an LPC54606J256ET100E type, and the memory is of a W25Q64 type.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010748444.9A CN111787360A (en) | 2020-07-30 | 2020-07-30 | IP network-based streaming media coding and decoding equipment |
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| CN202010748444.9A CN111787360A (en) | 2020-07-30 | 2020-07-30 | IP network-based streaming media coding and decoding equipment |
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