WO2011010841A2 - Transmission device and reception device of wireless av system - Google Patents

Transmission device and reception device of wireless av system Download PDF

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Publication number
WO2011010841A2
WO2011010841A2 PCT/KR2010/004694 KR2010004694W WO2011010841A2 WO 2011010841 A2 WO2011010841 A2 WO 2011010841A2 KR 2010004694 W KR2010004694 W KR 2010004694W WO 2011010841 A2 WO2011010841 A2 WO 2011010841A2
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WO
WIPO (PCT)
Prior art keywords
signal
unit
wireless
reception unit
reception
Prior art date
Application number
PCT/KR2010/004694
Other languages
French (fr)
Other versions
WO2011010841A3 (en
Inventor
Jonghoon Kim
Original Assignee
Lg Innotek Co., Ltd
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Filing date
Publication date
Application filed by Lg Innotek Co., Ltd filed Critical Lg Innotek Co., Ltd
Publication of WO2011010841A2 publication Critical patent/WO2011010841A2/en
Publication of WO2011010841A3 publication Critical patent/WO2011010841A3/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present invention relates to a wireless A/V (audio/video) system, more particularly regarding a wireless A/V system employed to support a Wi-Fi technology.
  • the television set outputs a broadcast signal transmitted from a broadcast station through a screen and a speaker, or outputs a broadcast and voice signal transmitted through a wired line from a DVD player or a video player using a screen and a speaker.
  • the present invention provides a wireless A/V system for processing a received un-compressed signal or a compressed signal and possibly held in a home or an office.
  • a reception device of the wireless AV system of the present invention includes a RF reception unit receiving an un-compressed signal or a compressed signal; a demodulation unit for demodulating a signal provided by the RF reception unit; and a main controller converting the un-compressed signal or compressed signal into an AV signal by controlling the RF reception unit and the demodulation unit.
  • the demodulation unit includes a base band unit for demodulating and delivering a signal provided by the RF; and a codec unit for transforming the signal provided by the base band unit into a video signal.
  • the present invention provides a transmission device of a wireless AV system including a HDMI reception unit for receiving and delivering an AV signal in HDMI format; an AV signal reception unit for transforming the audio signal and the video signal transmitted through the connector into a digital signal and outputting as an AV signal; a codec unit for coding and delivering a signal provided by the AV signal reception unit or the HDMI reception unit; and a WiFi module for wirelessly transmitting a signal delivered from the codec unit.
  • a transmission device of a wireless AV system of the present invention includes a memory device for storing data producing during processing of the codec unit.
  • a transmission device of a wireless AV system of the present invention includes a power block for supplying electric power to the HDMI reception unit, the AV signal reception unit, the codec unit and the WiFi module.
  • a wireless A/V system uses a wireless A/V signal of 5 GHz, and uses a WiFi technology together, the present invention can realize a wireless A/V system effectively at home and an office.
  • FIG. 1 is a block diagram regarding a wireless AV system according to a preferred embodiment of the present invention
  • FIG. 2 is a block diagram indicating a wireless AV reception unit arranged in a television set according to a preferred embodiment of the present invention
  • FIG. 3 is a block diagram implementing a wireless AV transmission unit according to a preferred embodiment of the present invention.
  • FIG. 4 is a block indicating a wireless AV reception unit connected to a television set according to a second preferred embodiment of the present invention.
  • a television set first was made into a braun tube, however a flat screen television set capable of outputting a screen onto a flat surface such as PDPs and LCDs is recently in wide use.
  • a screen of a television set is gradually large-scaled and a wall-hanging television is developing, there is a demand that consumers replace squalid cables with a wireless one.
  • the present invention is to propose a wireless AV system for connecting a television set to peripheral devices wirelessly.
  • a perfect wireless A/V system the following condition is required that the wireless A/V system has good property in obstacle penetration, a data transmission range between two electronic appliances is over a certain distance, a connectable interface is diversified, and a type of available electronic appliances is wide varied.
  • FIG. 1 is a block concerning a wireless AV system according to a preferred embodiment of the present invention.
  • a reception device of a wireless AV system includes a television set to receive data wirelessly from a computer 10, a set-top box 20, a DVD player 30 or a blue-ray player 40, the television set 50 having a wireless AV reception device 51.
  • the wireless AV reception device 51 includes a reception unit 51a directed to receive a RF signal of 2.4 GHz or 5 GHz, a WiFi wireless signal processing unit 51b and decoder 51c.
  • the wireless AV reception device 51 of the television set receives a signal from the computer 10 by means of a WiFi technology, and receives a wireless A/V signal from the set-top box 20, the DVD player 30, and the blue-ray player 40.
  • Wi-Fi is a wireless LAN technology that can use an internet through an apparatus such as a PDA or a laptop computer within a certain range from the center, that is a wireless access apparatus (AP) installed site.
  • AP wireless access apparatus
  • the concept of the present invention is to integrate a wireless AV module of 5 GHz band with a Wi-Fi technology that is used as a wireless internet so as to interface a television set and various devices to each other. By doing so, a genuine wireless AV system under no range constraint can be built.
  • the wireless AV reception device can improve the performance of the wireless AV reception device and solve constraints in position condition therein using the Wi-Fi technology and 5 GHz band.
  • FIG. 2 is a block diagram indicating a wireless AV reception unit arranged in a television set according to a preferred embodiment of the present invention.
  • a wireless AV reception device includes a RF reception unit 61 receiving an un-compressed signal and a compressed signal, a power unit 62, a main controller 63, and a demodulation unit 64.
  • the demodulation unit 64 includes a base band unit 64a and a Codec unit 64b.
  • the base band unit 64a is a block for a function of demodulating an inputted signal.
  • the present reception device receives a 802.11 x compressed signal and an un-compressed A/V signal at a RF reception unit 61, where the un-compressed signal passes through the base band unit 64a and is outputted into a A/V signal, and the compressed signal passes through the base band unit 64a, via a Codec unit 64b, outputting an A/V signal, and this procedure is controlled through the main controller 63.
  • the power unit 63 is one supplying electric power to each block of the wireless AV reception device.
  • the Codec unit 64b is a block having functions of a coder converting a sound or video signal into a digital signal and a decoder converting in a reverse direction.
  • the codec is the compound word of a coder and a decoder, referring to a block of transforming voice or video data into a digital in order for a computer to process voice or video data and reproducing that data on a monitor to make a computer user aware of that, and the codec helps binding vast volume of files like moving images in a small unit and reproducing the same in its original state.
  • the Codec unit 64b is a block including software converting voice or video data into a digital to be processed by a computer.
  • FIG. 3 is a block implementing a wireless AV transmission unit according to a preferred embodiment of the present invention.
  • an AV transmission unit includes a connector 71a ⁇ 71d, a HDMI reception unit 72, A/V signal reception unit 73, a Codec unit 75, a memory device 76, 77, a power block 74, and a WiFi module 78.
  • the HDMI reception unit 72 receives a HDMI format signal and delivers it to the Codec unit 75.
  • HDMI is a format that DVI, that is personal computer & display interface standard norm, is changed for AV home electronic appliances. Because video ⁇ voice is not compressed but transmitted from a player to a television side, it has a feature of not requiring a decoder chip or software and it has compatibility among connecting devices. Also, because video ⁇ voice ⁇ control signal is tranferred through an integrated single cable, it can simply the cumbersome wiring of an AV appliance. Also, a control signal may be sent so as to use each AV appliance coordinatively.
  • TDMS Transition Minimized Differential Signalling
  • HDCP High-bandwidth Digital Content Protection
  • authentification between appliances chooses EDID
  • CEC Control plane access of an entire system chooses CEC, etc.
  • the AV signal reception unit 73 includes a video signal conversion unit 73a, an audio signal conversion unit 73b and a multiplexer 73c.
  • the power block 74 is a block supplying electric power to each block.
  • the memory device 76, 77 is connected to the Codec unit 75, and the Codec unit 75 is used to store a necessary data during the operation of the Codec unit 75.
  • the WiFi module 78 acts to receive a signal provided by the Codec unit 75 and transfer the signal to the wireless AV reception device.
  • an effective wireless A/V system may be realized over obstacle penetration, a distance between two electronic appliances, a connectable interface, and a type of available electronic appliances, etc.
  • FIG. 4 is a block indicating a wireless AV reception unit connected to a television set according to a second preferred embodiment of the present invention.
  • a wireless AV reception unit may be implemented in a Dongle type, thus can be installed in a television set not having a wireless AV signal reception function.
  • a wireless AV reception unit when a wireless AV reception unit is implemented in a dongle type, and connected to a television set using a USB port, a wireless AV system may be realized in a television set without an existing wireless AV signal reception function.
  • a wireless AV system By using a television set currently avaiable, a wireless AV system may be realized with a minimum cost.
  • a wireless A/V system can employ a short-range communication and WiFi technologies together for transmitting a wireless A/V data of 5 GHz frequency band, thus providng a wireless A/V system at home or an office.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Disclosed herein is a wireless A/V system available at home or an office. The present invention provides a reception device of a wireless AV system comprising a RF reception unit receiving an un-compressed signal or compressed signal; a demodulation unit for domodulating a signal provided by the RF reception unit; and a main controller converting the un-compressed signal or compressed signal into an AV signal by controlling the RF reception unit and the demodulation unit.

Description

TRANSMISSION DEVICE AND RECEPTION DEVICE OF WIRELESS AV SYSTEM
The present invention relates to a wireless A/V (audio/video) system, more particularly regarding a wireless A/V system employed to support a Wi-Fi technology.
In concert with technology advance, a variety of electronic appliances have been growing. Of various electronic appliances, there are television sets, DVD players, video players, sound systems, etc. as electronic appliances used to output a video signal/voice signal or a voice signal. In general, the television set outputs a broadcast signal transmitted from a broadcast station through a screen and a speaker, or outputs a broadcast and voice signal transmitted through a wired line from a DVD player or a video player using a screen and a speaker.
As a recent advance of science technologies, a technogoly of transmitting a video signal and a video signal wirelessly is evolving. Recently, a wide range of technologies wirelessly connecting a television with various types of electronic appliances, for example a set-top box, a DVD player, etc. have been developed.
The present invention provides a wireless A/V system for processing a received un-compressed signal or a compressed signal and possibly held in a home or an office.
A reception device of the wireless AV system of the present invention includes a RF reception unit receiving an un-compressed signal or a compressed signal; a demodulation unit for demodulating a signal provided by the RF reception unit; and a main controller converting the un-compressed signal or compressed signal into an AV signal by controlling the RF reception unit and the demodulation unit.
Also, the demodulation unit includes a base band unit for demodulating and delivering a signal provided by the RF; and a codec unit for transforming the signal provided by the base band unit into a video signal.
Also, the present invention provides a transmission device of a wireless AV system including a HDMI reception unit for receiving and delivering an AV signal in HDMI format; an AV signal reception unit for transforming the audio signal and the video signal transmitted through the connector into a digital signal and outputting as an AV signal; a codec unit for coding and delivering a signal provided by the AV signal reception unit or the HDMI reception unit; and a WiFi module for wirelessly transmitting a signal delivered from the codec unit.
Also, a transmission device of a wireless AV system of the present invention includes a memory device for storing data producing during processing of the codec unit.
Also, a transmission device of a wireless AV system of the present invention includes a power block for supplying electric power to the HDMI reception unit, the AV signal reception unit, the codec unit and the WiFi module.
Because a wireless A/V system according to the present invention uses a wireless A/V signal of 5 GHz, and uses a WiFi technology together, the present invention can realize a wireless A/V system effectively at home and an office.
FIG. 1 is a block diagram regarding a wireless AV system according to a preferred embodiment of the present invention;
FIG. 2 is a block diagram indicating a wireless AV reception unit arranged in a television set according to a preferred embodiment of the present invention;
FIG. 3 is a block diagram implementing a wireless AV transmission unit according to a preferred embodiment of the present invention; and
FIG. 4 is a block indicating a wireless AV reception unit connected to a television set according to a second preferred embodiment of the present invention.
Hereinafter, with an intention to describe the present invention in detail such that those skilled in the art can practice the inherent scope of the invention, a most preferred embodiment of the present invention will be presented with reference to the annexed drawings.
As technologies advance, various kinds of electronic appliances, for example a DVD player, a blue-ray device, a computer, etc. has been developed, and these devices are connected to a television set through a wired cable.
A television set first was made into a braun tube, however a flat screen television set capable of outputting a screen onto a flat surface such as PDPs and LCDs is recently in wide use. As a screen of a television set is gradually large-scaled and a wall-hanging television is developing, there is a demand that consumers replace squalid cables with a wireless one.
The present invention is to propose a wireless AV system for connecting a television set to peripheral devices wirelessly. To implement a perfect wireless A/V system, the following condition is required that the wireless A/V system has good property in obstacle penetration, a data transmission range between two electronic appliances is over a certain distance, a connectable interface is diversified, and a type of available electronic appliances is wide varied.
FIG. 1 is a block concerning a wireless AV system according to a preferred embodiment of the present invention.
As shown in FIG. 1, a reception device of a wireless AV system according to the present embodiment includes a television set to receive data wirelessly from a computer 10, a set-top box 20, a DVD player 30 or a blue-ray player 40, the television set 50 having a wireless AV reception device 51. The wireless AV reception device 51 includes a reception unit 51a directed to receive a RF signal of 2.4 GHz or 5 GHz, a WiFi wireless signal processing unit 51b and decoder 51c. Particularly, the wireless AV reception device 51 of the television set receives a signal from the computer 10 by means of a WiFi technology, and receives a wireless A/V signal from the set-top box 20, the DVD player 30, and the blue-ray player 40.
Wi-Fi is a wireless LAN technology that can use an internet through an apparatus such as a PDA or a laptop computer within a certain range from the center, that is a wireless access apparatus (AP) installed site. At its early stage, the radio wave arrival distance was only 10 m, but in recent years it is sharply extended to about 50~several hundreds meters.
The concept of the present invention is to integrate a wireless AV module of 5 GHz band with a Wi-Fi technology that is used as a wireless internet so as to interface a television set and various devices to each other. By doing so, a genuine wireless AV system under no range constraint can be built. The wireless AV reception device can improve the performance of the wireless AV reception device and solve constraints in position condition therein using the Wi-Fi technology and 5 GHz band.
FIG. 2 is a block diagram indicating a wireless AV reception unit arranged in a television set according to a preferred embodiment of the present invention.
As shown in FIG. 2, a wireless AV reception device according to the present embodiment includes a RF reception unit 61 receiving an un-compressed signal and a compressed signal, a power unit 62, a main controller 63, and a demodulation unit 64. The demodulation unit 64 includes a base band unit 64a and a Codec unit 64b. The base band unit 64a is a block for a function of demodulating an inputted signal.
The present reception device receives a 802.11 x compressed signal and an un-compressed A/V signal at a RF reception unit 61, where the un-compressed signal passes through the base band unit 64a and is outputted into a A/V signal, and the compressed signal passes through the base band unit 64a, via a Codec unit 64b, outputting an A/V signal, and this procedure is controlled through the main controller 63. The power unit 63 is one supplying electric power to each block of the wireless AV reception device.
The Codec unit 64b is a block having functions of a coder converting a sound or video signal into a digital signal and a decoder converting in a reverse direction. The codec is the compound word of a coder and a decoder, referring to a block of transforming voice or video data into a digital in order for a computer to process voice or video data and reproducing that data on a monitor to make a computer user aware of that, and the codec helps binding vast volume of files like moving images in a small unit and reproducing the same in its original state. Herein, the Codec unit 64b is a block including software converting voice or video data into a digital to be processed by a computer.
FIG. 3 is a block implementing a wireless AV transmission unit according to a preferred embodiment of the present invention.
As shown in FIG. 3, an AV transmission unit according to the present embodiment includes a connector 71a ~ 71d, a HDMI reception unit 72, A/V signal reception unit 73, a Codec unit 75, a memory device 76, 77, a power block 74, and a WiFi module 78.
The HDMI reception unit 72 receives a HDMI format signal and delivers it to the Codec unit 75. HDMI is a format that DVI, that is personal computer & display interface standard norm, is changed for AV home electronic appliances. Because video·voice is not compressed but transmitted from a player to a television side, it has a feature of not requiring a decoder chip or software and it has compatibility among connecting devices. Also, because video·voice·control signal is tranferred through an integrated single cable, it can simply the cumbersome wiring of an AV appliance. Also, a control signal may be sent so as to use each AV appliance coordinatively. It is a signal format mode in which the physical layer adopts TDMS (Transition Minimized Differential Signalling), signal encryption adopts HDCP (High-bandwidth Digital Content Protection), authentification between appliances chooses EDID, and an control plane access of an entire system chooses CEC, etc.
The AV signal reception unit 73 includes a video signal conversion unit 73a, an audio signal conversion unit 73b and a multiplexer 73c. The power block 74 is a block supplying electric power to each block. The memory device 76, 77 is connected to the Codec unit 75, and the Codec unit 75 is used to store a necessary data during the operation of the Codec unit 75. The WiFi module 78 acts to receive a signal provided by the Codec unit 75 and transfer the signal to the wireless AV reception device.
As mentioned above hereto, when a wireless AV reception device and a wireless AV transmission device proposed by the present invention are used, an effective wireless A/V system may be realized over obstacle penetration, a distance between two electronic appliances, a connectable interface, and a type of available electronic appliances, etc.
FIG. 4 is a block indicating a wireless AV reception unit connected to a television set according to a second preferred embodiment of the present invention.
As shown in FIG. 4, a wireless AV reception unit according to the present embodiment may be implemented in a Dongle type, thus can be installed in a television set not having a wireless AV signal reception function. Thus when a wireless AV reception unit is implemented in a dongle type, and connected to a television set using a USB port, a wireless AV system may be realized in a television set without an existing wireless AV signal reception function. By using a television set currently avaiable, a wireless AV system may be realized with a minimum cost.
While the present invention has been described through the foregoing representative embodiment, it would be understood by those skilled in the art that various change in the aforementioned embodiment can be made without departing from the scope of the present invention. Therefore, the rights scope of the present invention is not limited to the described embodiments, but should be defined by the following claims and equivalents thereof.
A wireless A/V system according to the present invention can employ a short-range communication and WiFi technologies together for transmitting a wireless A/V data of 5 GHz frequency band, thus providng a wireless A/V system at home or an office.

Claims (5)

  1. A reception device of a wireless AV system, comprising:
    a RF reception unit receiving an un-compressed signal or compressed signal;
    a demodulation unit for domodulating a signal provided by the RF reception unit; and
    a main controller converting the un-compressed signal or compressed signal into an AV signal by controlling the RF reception unit and the demodulation unit.
  2. The reception device of claim 1, wherein the demodulation unit comprises:
    a base band unit for demodulating and delivering a signal provided by the RF reception unit; and
    a codec unit for converting a signal provided by the base band unit into a video signal.
  3. A transmission device of a wireless AV system, comprising:
    a HDMI reception unit for receiving an AV signal in an HDMI format;
    an AV signal reception unit for transforming an audio signal and a video signal transferred through the connector into a digital signal and outputting it as an AV signal;
    a codec unit for coding and delivering a signal provided by the AV signal reception unit or the HDMI reception unit; and
    a WiFi module for transmitting a signal delivered by the codec unit wirelessly.
  4. The transmission device of claim 3, further comprising a memory device for storing data that are produced during the codec unit processing.
  5. The transmission device of claim 3, comprising a power block for supplying electric power to the HDMI reception unit, the AV signal reception unit, the codec unit and the WiFi module.
PCT/KR2010/004694 2009-07-21 2010-07-19 Transmission device and reception device of wireless av system WO2011010841A2 (en)

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KR1020090066402A KR20110008860A (en) 2009-07-21 2009-07-21 Wireless a/v system
KR10-2009-0066402 2009-07-21

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WO2011010841A2 true WO2011010841A2 (en) 2011-01-27
WO2011010841A3 WO2011010841A3 (en) 2011-05-19

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Citations (2)

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Publication number Priority date Publication date Assignee Title
KR20060113926A (en) * 2003-11-17 2006-11-03 소니 일렉트로닉스 인코포레이티드 Method and system for wireless digital multimedia transmission
KR20080009063A (en) * 2005-03-15 2008-01-24 라디오스파이어 네트웍스, 인크. System, method, and apparatus for wireless delivery of content between a generalized content source and a generalized content sink

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Publication number Priority date Publication date Assignee Title
KR100801002B1 (en) * 2006-06-05 2008-02-11 삼성전자주식회사 Method for transferring/playing multimedia data on wireless network and wireless device thereof
CN201114507Y (en) * 2007-09-20 2008-09-10 厦门华侨电子股份有限公司 A wireless digital high-definition interface device without compression
TWM335896U (en) * 2007-11-15 2008-07-01 chang-zhi Chen Wireless video-frequency transmission device

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
KR20060113926A (en) * 2003-11-17 2006-11-03 소니 일렉트로닉스 인코포레이티드 Method and system for wireless digital multimedia transmission
KR20080009063A (en) * 2005-03-15 2008-01-24 라디오스파이어 네트웍스, 인크. System, method, and apparatus for wireless delivery of content between a generalized content source and a generalized content sink

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TW201116053A (en) 2011-05-01
TWI449426B (en) 2014-08-11
KR20110008860A (en) 2011-01-27
WO2011010841A3 (en) 2011-05-19

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