CN214480952U - 4K HDMI audio/video wireless extender - Google Patents
4K HDMI audio/video wireless extender Download PDFInfo
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- CN214480952U CN214480952U CN202021986340.3U CN202021986340U CN214480952U CN 214480952 U CN214480952 U CN 214480952U CN 202021986340 U CN202021986340 U CN 202021986340U CN 214480952 U CN214480952 U CN 214480952U
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Abstract
The utility model discloses a wireless extender of 4K HDMI sound video, send ware and wireless audio video receiver including wireless audio video, wireless audio video sends the signal that the ware conveys and is received by wireless audio video receiver to spread. The utility model discloses a new generation's H.265 video coding and decoding processing circuit, adopt the two-way communication mode, be equivalent to a signal repeater when HDMI DVI signal transmission, can convey the information of DDC passageway to sending terminal and signal source completely, adopt the mode of procedure default SSID to realize pairing between transmitter and the receiver, the user takes arbitrary transmitter to add one or more receiver circular telegrams and just can use, do not need equipment to pair one by one, adopt multichannel transmission technology, can manual selection signal transmission frequency in certain frequency range, avoid the interference of common frequency signal.
Description
Technical Field
The utility model relates to a wireless audio frequency and video transmission field, concretely relates to wireless extender of 4K HDMI audio frequency and video.
Background
With the progress and development of electronic technology, the audio and video field develops from the earliest analog signal to digital high definition gradually, and new signal formats and new high-definition interface types continuously emerge, so that the connection between devices is problematic, and the problems are mainly reflected in various interface types, complex wiring and difficult problem maintenance. Due to the development of wireless technology, a plurality of products for wirelessly transmitting audio and video begin to appear on the market, so that the problem is expected to be solved. The wireless transmission audio-video product generally comprises a transmitter and a receiver. The transmitter is connected with a signal source, the receiver is connected with a display, the transmitter and the receiver are connected by radio frequency, and usually adopt an H.264 coding and decoding compression mode and a 2.4G/5.8G public frequency band as a transmission frequency band.
Although the existing wireless transmission audio and video products solve the problem of wiring, the defects still exist due to technical limitation. The most common problems are the following:
first, the image quality is poor and the sharpness is not high. The high-definition audio and video data volume is huge, and before transmission, encoding compression is usually carried out to reduce the code rate and then transmission is carried out. Under the condition of limited wireless transmission bandwidth, the video data can be transmitted in real time only by being greatly compressed, thereby affecting the image quality. At present, the H.264 coding mode is generally adopted, and the picture resolution can only reach the level of 1080P FHD.
In the second and unidirectional transmission modes, the source end cannot read the EDID information of the display end, and the receiving end can only output the EDID information according to the fixed audio/video format, which may cause the display to be unable to obtain the signal of the optimal format, even the picture cannot be obtained due to the compatibility problem.
Third, the transmitter and receiver need to be paired for use before use, and typically only one-to-one transmission is possible.
And fourthly, transmission at fixed frequency is easy to be interfered by same-frequency signals.
Disclosure of Invention
The utility model aims to solve the technical problem that a can support the wireless audio and video transmission extender of HDMI of 4K video resolution ratio is provided, adopts the mature H.265 video coding and decoding technique and the international ISM frequency channel of 5.8G of technology at present, can thoroughly or solve to a certain extent and meet the problem in the above background art.
The utility model discloses a realize through following technical scheme: A4K HDMI audio/video wireless extender comprises a wireless audio/video transmitter and a wireless audio/video receiver, wherein signals transmitted by the wireless audio/video transmitter are received and transmitted by the wireless audio/video receiver;
the wireless audio and video transmitter and the wireless audio and video receiver both comprise a USB/serial port/IR transparent transmission, a high-definition audio and video codec and a radio frequency transceiving module;
the wireless audio and video transmitter further comprises an audio and video input interface, an interface conversion/video ADC and an audio ADC, wherein the wireless audio and video receiver further comprises an interface conversion/video DAC, an audio DAC and an audio and video output interface;
the video signal and the audio signal are respectively transmitted to the interface conversion/video ADC and the audio ADC through the audio/video input interface, converted into a digital video signal and a digital audio signal and output to the high-definition audio/video codec, and the high-definition audio/video codec packs the encoded signal and the auxiliary control signal transmitted by the USB/serial port/IR together and transmits the packed signal to the wireless audio/video receiver through the radio frequency transceiver module;
the signal is received by a radio frequency transceiving module in the wireless audio and video receiver, is transmitted to a high-definition audio and video codec set USB/serial port/IR transparent transmission to restore the signal to a digital video signal and a digital audio signal, and is converted into an analog signal by an interface conversion/video DAC (digital-to-analog converter) and an audio DAC (digital-to-analog converter) and is output to an audio and video output interface.
As the preferred technical scheme, the audio and video input interface is an HDMI interface, a DVI interface and a VGA interface.
As a preferred technical scheme, the audio and video input interface and the audio and video output interface are a 4K audio and video input interface and an audio and video output interface.
As a preferred technical solution, the radio frequency transceiver module is a 5.8G radio frequency transceiver module.
As a preferred technical solution, the video signal converted by the interface conversion/video ADC is a VGA analog video signal and is converted into a TTL digital video signal.
As the preferred technical scheme, the signals restored by the wireless audio and video receiver are RGB/YUV digital video signals and LPCM digital audio signals.
The utility model has the advantages that:
1. by adopting a new generation of H.265 video coding and decoding mode, compared with H.264, the compression efficiency is improved by more than one time, which means that under the condition of the same code rate, the new compression coding mode can obviously improve the picture quality, and the picture resolution can also be supported to 4K at most;
2. the device adopts a bidirectional communication mode, is equivalent to a signal repeater when HDMI/DVI signals are transmitted, and can completely transmit the information of a DDC channel to a transmitting end and a signal source, so that the devices can better work compatibly as if wired connection is used, the best sound picture output effect is achieved, meanwhile, because the DDC channel can normally communicate, the verification of HDCP can be easily solved, and the product can be provided with control signal transparent transmission channels such as USB/RS232 serial ports/IR and the like, and can be better matched with peripheral devices for use;
3. the pairing between the transmitter and the receiver is realized by adopting a mode of presetting SSIDs by a program, a user can use any transmitter and one or more receivers by electrifying without pairing the devices one by one, and when a plurality of sets of devices are used in the same environment, the user can enter a background configuration interface of a product and can distinguish by modifying different SSIDs;
4. by adopting a multi-channel transmission technology, the signal transmission frequency can be manually selected in a certain frequency range, the interference of the same frequency signal is avoided, and the method can adapt to more working environments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of the system of the present invention;
fig. 2 is a circuit diagram of a power supply part of the high definition audio and video codec U6 according to the present invention;
FIG. 3 is a circuit diagram of a power supply portion of the HDAV codec U6 including a DDR3 controller according to the present invention;
fig. 4 and 5 are partial circuit diagrams of DDR3 according to the present invention;
fig. 6 is a circuit diagram of the kernel portion of the system of the present invention;
fig. 7 is a circuit diagram of the rf transceiver module of the present invention;
fig. 8 is a circuit diagram of the conversion from J5 input to the interface of the present invention;
fig. 9 is a circuit diagram of the conversion from J5 input to the interface of the present invention;
fig. 10 is a partial circuit diagram of a high definition audio/video codec U6 according to the present invention;
fig. 11 and 12 are partial circuit diagrams of the interface outputting to the HDMI output port according to the present invention;
fig. 13 is a circuit diagram of the transmitting and receiving circuit of the mid-wideband infrared remote control signal of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "disposed" are to be construed broadly, and may for example be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-13, the utility model discloses a 4K HDMI audio/video wireless extender, which comprises a wireless audio/video transmitter and a wireless audio/video receiver, wherein the signal transmitted by the wireless audio/video transmitter is received by the wireless audio/video receiver and is transmitted out;
the wireless audio and video transmitter and the wireless audio and video receiver both comprise a USB/serial port/IR transparent transmission, a high-definition audio and video codec and a radio frequency transceiving module;
the wireless audio and video transmitter further comprises an audio and video input interface, an interface conversion/video ADC and an audio ADC, wherein the wireless audio and video receiver further comprises an interface conversion/video DAC, an audio DAC and an audio and video output interface;
as a preferred technical scheme, a signal input port of the transmitter is provided with three types of interfaces of HDMI, DVI and VGA, wherein the DVI and VGA interface types are also provided with 3.5 earphone interfaces to input analog audio signals, and after interface conversion or ADC conversion is carried out on each input signal, the input signals are uniformly output to a high-definition audio and video codec as TTL digital RGB video and I2S digital audio.
The high-definition audio and video coder and decoder adopts an H.265 coding mode, has the characteristics of extremely low code rate, high-quality images, strong fault tolerance capability, strong network adaptability and the like, the bandwidth required by the coded signals in the network transmission process is relatively small, the high-definition audio and video coder and decoder is very suitable for transmitting audio and video signals through a wireless network, the coder packs and transmits auxiliary control signals transmitted through a USB/serial port/IR together while coding, the synchronous transmission of the control signals is completed, after the coding is completed, data streams are packed into data packets based on TCP/IP network standards, and then the signals are transmitted out through a wireless transmitting module.
The working signal flow of the wireless audio and video receiver is opposite to that of the transmitter, the receiver receives the network data transmitted by the transmitter through the radio frequency transceiver module, then the data is subjected to error correction, decoding, decryption and decompression, RGB/YUV digital video signals and LPCM digital audio signals are restored again, and VGA output signals need to be converted into analog signals through a video DAC (digital-to-analog converter) and an audio DAC (digital-to-analog converter) for output; the HDMI/DVI signal needs to be subjected to TMDS signal coding through a TX chip and output in a TMDS data format.
As shown in FIG. 2, the power supply part of the high-definition audio/video codec U6 is powered by three groups of power supplies, namely 3.3V, 1.2V DVDD _ CPU and 1.0V DVDD CORE.
As shown in fig. 3, the high-definition audio/video encoder U6 includes a DDR3 controller circuit part, is connected to an external DDR3, and is responsible for data control and exchange in the audio/video encoding and decoding process.
As shown in fig. 4 and 5, U8 is an external DDR3, and provides a running memory space for the system codec operation process. U11 is SPI FLASH and provides storage space for system program operation.
As shown in fig. 6, the high-definition audio/video codec U6 includes a system control chip, a crystal oscillator X1 generates a 24M frequency to provide a system clock for U6, the high-definition audio/video codec U6 includes an h.265 encoder and an h.265 decoder at the same time, and when the device is used as a transmitter, the high-definition audio/video codec U6 serves as an encoder; when the device is used as a receiver, the high-definition audio and video codec U6 acts as a decoder. After the power-on reset initialization, the transmitter 5.8G radio frequency transceiver module works in the AP mode, the receiver 5.8G radio frequency transceiver module works in the SAT mode, and the receiver can be automatically connected to the corresponding transmitter AP end according to the SSID and the password set by the program. One transmitter may support multiple receivers connected simultaneously.
When the device is used as a transmitter, as shown in fig. 8 and fig. 9, an HDMI high-definition audio/video signal is input from J5 to the interface conversion circuit U13. The PIN16/17 of U13 is a DDC channel of HDMI RX, which is a channel for signal source to read EDID signal of equipment. The PIN13/14 is an I2C communication interface, is in butt joint with the master control U6G 19/F20 and receives related control commands of the master control. The U13 is responsible for separating out video signals and audio signals from the HDMI TMDS signals and respectively outputting the video signals and the audio signals to the high-definition audio and video codec U6. The video signal is output from a data interface of 16Bit BT1120 consisting of QE16 and QE35 of U13; the audio signal is output from the I2S digital audio interface P41/42/45/46 of U13.
As shown in fig. 10, the high-definition audio/video codec U6 supports one path of BT1120 digital video input and one path of I2S digital audio input, the input digital video signal and the input digital audio signal are divided into two parts in the high-definition audio/video codec U6, and one path of the input digital video signal and the input digital audio signal is compressed and encoded by h.265 and then output to an external 5.8G radio frequency transceiver module (as shown in fig. 7) through a USB interface of the high-definition audio/video codec U6. The other path is re-encoded into a TMDS signal by an HDMI encoding circuit inside the high definition audio/video codec U6, and is output from the HDMI interface of U6 to the HDMI output port (as shown in fig. 11 and fig. 12).
When the device is used as a receiver, the system receives the audio/video streaming transmitted by the transmitter through a 5.8G radio frequency transceiver module (as shown in fig. 7), and transmits the audio/video streaming to a high-definition audio/video codec U6 for h.265 decoding, the decoded audio/video signal is re-encoded into a TMDS signal through an HDMI encoding circuit inside a high-definition audio/video codec U6, and the TMDS signal is output from an HDMI interface of U6 to an HDMI output port (as shown in fig. 11 and fig. 12).
As shown in fig. 12, the high-definition audio/video codec U6 at the receiving end reads the EDID information of the display device through the PIN15/16 of the DDC channel at the HDMI output port, and the EDID information is processed through the high-definition audio/video codec U6 and then transmitted back to the transmitting end through the 5.8G radio frequency transceiver module. As shown in fig. 9, after the high-definition audio/video codec U6 at the receiving end parses and also sources the EDID information, the EDID information is written into the interface conversion circuit U13 through the G19/F20I 2C bus, and the EDID information is read by the signal source through the interface conversion circuit U13 PIN16/17 PIN.
As shown in fig. 13, the system supports the transmission of broadband infrared remote control signals at the transmitting and receiving ends, the main controller detects whether a device is inserted through an IR _ DET signal detection terminal J3, and then determines whether the device is an infrared receiving head or an infrared transmitting head through an IR _ RX. If the inserting device is a receiving head, receiving corresponding data through IR _ RX; if the head is a transmitting head, a signal is output through the external equipment through the IR TX.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (6)
1. The utility model provides a wireless extender of 4K HDMI audio frequency and video which characterized in that: the wireless audio and video transmitter is used for transmitting signals to the wireless audio and video receiver;
the wireless audio and video transmitter and the wireless audio and video receiver both comprise a USB/serial port/IR transparent transmission, a high-definition audio and video codec and a radio frequency transceiving module;
the wireless audio and video transmitter further comprises an audio and video input interface, an interface conversion/video ADC and an audio ADC, wherein the wireless audio and video receiver further comprises an interface conversion/video DAC, an audio DAC and an audio and video output interface;
the video input interface is respectively connected with the interface conversion/video ADC and the audio ADC and converts the video input interface into a digital video signal and a digital audio signal, the output ends of the USB/serial port/IR transparent transmission interface, the interface conversion/video ADC and the audio ADC are connected with a high-definition audio and video codec, and the high-definition audio and video codec is connected to the radio frequency transceiving module;
the wireless audio and video receiver also comprises an interface conversion/video DAC and an audio DAC, wherein the USB/serial port/IR transparent transmission, the interface conversion/video DAC and the audio DAC are respectively connected with the output end of the high-definition audio and video codec, the high-definition audio and video codec is connected with a radio frequency transceiving module in the wireless audio and video receiver, and the interface conversion/video DAC and the audio DAC are both connected with a 4K audio and video output interface.
2. The 4K HDMI audio-video wireless extender of claim 1, wherein: the audio and video input interface is an HDMI interface, a DVI interface and a VGA interface.
3. The 4K HDMI audio-video wireless extender of claim 1, wherein: the audio and video input interface and the audio and video output interface are a 4K audio and video input interface and an audio and video output interface.
4. The 4K HDMI audio-video wireless extender of claim 1, wherein: the radio frequency transceiving module is a 5.8G radio frequency transceiving module.
5. The 4K HDMI audio-video wireless extender of claim 1, wherein: and converting the video signal converted by the interface conversion/video ADC into a VGA analog video signal and converting the VGA analog video signal into a TTL digital video signal.
6. The 4K HDMI audio-video wireless extender of claim 1, wherein: the signals restored by the wireless audio and video receiver are RGB/YUV digital video signals and LPCM digital audio signals.
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| CN202021986340.3U CN214480952U (en) | 2020-09-11 | 2020-09-11 | 4K HDMI audio/video wireless extender |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115021863A (en) * | 2022-08-04 | 2022-09-06 | 深圳市品为科技有限公司 | Single network cable extender for data transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115021863A (en) * | 2022-08-04 | 2022-09-06 | 深圳市品为科技有限公司 | Single network cable extender for data transmission |
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