CN202364306U

CN202364306U - HDMI coder-decoder

Info

Publication number: CN202364306U
Application number: CN2011204535178U
Authority: CN
Inventors: 季长勇
Original assignee: ZHIYONG ELECTRICAL CO Ltd
Current assignee: ZHIYONG ELECTRICAL CO Ltd
Priority date: 2011-11-16
Filing date: 2011-11-16
Publication date: 2012-08-01
Anticipated expiration: 2021-11-16

Abstract

The utility model discloses an HDMI (High Definition Multimedia Interface) coder-decoder including a coder and a decoder connected with each other. The coder includes a DSP module. A network terminal of the DSP module of the coder connects with a network card control chip. An input terminal of the DSP module of the coder connects with an HDMI receiving module while another two input terminals connect with an RS232 module and a USB module respectively. The decoder includes another DSP module. A network terminal of the DSP module of the decoder connects with a network card control chip. An output terminal of the DSP module of the decoder connects with the HDMI sending module while another two output terminals connect with the RS232 module and the USB module respectively. The HDMI coder-decoder in the utility model transmits HDMI signals, RS232 signals and USB signals in a mixed and compressed manner, thereby prolonging the transmission distance of the signal transmission substantially and realizing the point-to-point transmission.

Description

The HDMI codec

Technical field

The utility model relates to a kind of digital visual interface device, relates in particular to a kind of HDMI codec.

Background technology

HDMI is based on DVI (Digital Visual Interface) formulation, is the abbreviation of High Definition MultimediaInterface (high score numeral multimedia interface), can be regarded as reinforcement and the extension of DVI, and both can be compatible.HDMI is in the high-resolution video and the multichannel audio data that guarantee can transmit with digital form under the high-quality situation uncompressed.HDMI can support all ATSC HDTV standards; Not only can satisfy the resolution of at present high image quality 1080p; Can also support state-of-the-art digital audio formats such as DVD Audio; Support the transmission of Eight-channel 96kHz or stereo 192kHz digital audio, and only connect, can be used to exempt the digital audio wiring with a HDMI line.The additional extension space that possessed of HDMI standard meanwhile, it allows to be applied in the form of the audio or video of upgrading in the future.Compare volume littler and the support while transmission of audio and the vision signal of HDMI interface with DVI.

HDMI compares with the existing DVI that belongs to digital interface together; The maximum change of HDMI has been video and audio transmission integrated, and the interface volume is little, and its flexibility and convenience have superiority; The HDMI interface has only just solved two kinds of outputs with a line, with the line of simplified apparatus greatly.At present; The HDMI signal adopts the HDMI cable transmission mostly, and along with the extensive use of high definition product, the problem that faces also comes one after another; Because high-definition signal (like 1080P) data are bigger; In transmission course, tend to run into following problem: 1) transmission range is short, because common HDMI wire rod signal attenuation in remote transmission, time-delay causes the distortion of image more greatly; 2) domestic a lot of employing optical fiber transmits the HDMI signal, but because cost is expensive, a lot of engineerings can't be widely used; 3) can not transmit simultaneously through the single line cable and comprise HDMI video, RS232 serial ports, usb signal.Therefore a kind of HDMI codec is provided, to solve the problem of HDMI signal, RS232 rs 232 serial interface signal, usb signal long-distance transmissions.

The utility model content

The utility model technical problem to be solved provides a kind of HDMI codec, can improve the stability of video and audio signal transmission, and can utilize the transmission that realizes point-to-multipoint.

The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of HDMI codec, comprises continuous encoder; Said encoder comprises the DSP module, and the network terminal of the DSP module of said encoder links to each other with the network interface card control chip, and an input links to each other with the HDMI receiver module, and two inputs link to each other with RS232 module, USB module respectively in addition; Said decoder comprises another DSP module, and the network terminal of the DSP module of said decoder links to each other with the network interface card control chip, and an output links to each other with the HDMI sending module, and two outputs link to each other with RS232 module, USB module respectively in addition.

Above-mentioned HDMI codec, wherein, said DSP module is connected with FLASH memory module, DDR memory modules both-way communication.

Above-mentioned HDMI codec, wherein, said network interface card control chip is a MARVELL 88E1111 network chip.

The utility model contrast prior art has following beneficial effect: the HDMI codec that the utility model provides; Pass through Network Transmission after HDMI signal, RS232 signal, usb signal compressed with DSP; Again network data flow is reduced into HDMI signal, RS232 signal, usb signal through DSP; Thereby improve the transmission range of signal transmission greatly; Realize the transmission of point-to-multipoint, and can use USB interface to connect external equipments such as keyboard, mouse, portable hard drive, the feasible all functions that can use computer at a distance equally.

Description of drawings

Fig. 1 is the HDMI codec structure sketch map of the utility model.

Among the figure:

1DSP module 2HDMI receiver module 3HDMI sending module

4RS232 module 5FLASH memory module 6USB module

7DDR memory modules 8 network interface card control chips 9 power modules

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.

Fig. 1 is the HDMI codec structure sketch map of the utility model.

See also Fig. 1, the HDMI codec that the utility model provides comprises continuous encoder; Said encoder comprises DSP module 1, and the network terminal of the DSP module 1 of said encoder links to each other with network interface card control chip 8, and an input links to each other with HDMI receiver module 2, and two inputs link to each other with RS232 module 4, USB module 3 respectively in addition; Said decoder comprises another DSP module 1, and the network terminal of the DSP module 1 of said decoder links to each other with network interface card control chip 8, and an output links to each other with HDMI sending module 3, and two outputs link to each other with RS232 module 4, USB module 3 respectively in addition.

Above-mentioned HDMI codec, said DSP module 1 is connected with FLASH memory module 5, DDR memory modules 7 both-way communications; The power end of said DSP module 1 links to each other with power module 9.

The master control chip of network interface card is the core parts of network interface card, and the quality of a network interface card performance mainly is a quality of seeing this chip block.The master control chip of network interface card generally adopts the low power consuming design of 3.3V, the chip technology of 0.35 μ m, this make it fast calculated flow through the data of network interface card, thereby offloading the CPU.Network interface card control chip 8 can adopt common mainboard integrated network chip MARVELL 88E1111.Mainboard integrated network chip is called the PHY network chip again, is meant that the arithmetic section of network control chip is transferred to the AST1500 chip to be handled, and with the simplification line design, thereby reduces cost.

In sum; The HDMI codec that the utility model provides; Pass through Network Transmission after HDMI signal, RS232 signal, usb signal compressed with DSP module 1; Again network data flow is reduced into HDMI signal, RS232 signal, usb signal through DSP module 1, thereby improves the transmission range of signal transmission greatly, realize the transmission of point-to-multipoint; And can use USB module 6 to connect external equipments such as keyboard, mouse, portable hard drive, the feasible all functions that can use computer at a distance equally.

Though the utility model discloses as above with preferred embodiment; Right its is not in order to limit the utility model; Any those skilled in the art; In spirit that does not break away from the utility model and scope, when can doing a little modification and perfect, so the protection range of the utility model is when being as the criterion with what claims defined.

Claims

1. HDMI codec; Comprise continuous encoder; It is characterized in that said encoder comprises DSP module (1), the network terminal of the DSP module (1) of said encoder links to each other with network interface card control chip (8); An input links to each other with HDMI receiver module (2), and two inputs link to each other with RS232 module (4), USB module (3) respectively in addition;

Said decoder comprises another DSP module (1); The network terminal of the DSP module (1) of said decoder links to each other with network interface card control chip (8); An output links to each other with HDMI sending module (3), and two outputs link to each other with RS232 module (4), USB module (3) respectively in addition.

2. HDMI codec as claimed in claim 1 is characterized in that, said DSP module (1) is connected with FLASH memory module (5), DDR memory modules (7) both-way communication.

3. according to claim 1 or claim 2 HDMI codec is characterized in that said network interface card control chip (8) is a MARVELL 88E1111 network chip.