WO2016177302A1 - Dispositif, système et procédé de connexion pour un multiplexage d'interface dans un décodeur - Google Patents

Dispositif, système et procédé de connexion pour un multiplexage d'interface dans un décodeur Download PDF

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Publication number
WO2016177302A1
WO2016177302A1 PCT/CN2016/080766 CN2016080766W WO2016177302A1 WO 2016177302 A1 WO2016177302 A1 WO 2016177302A1 CN 2016080766 W CN2016080766 W CN 2016080766W WO 2016177302 A1 WO2016177302 A1 WO 2016177302A1
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WO
WIPO (PCT)
Prior art keywords
signal
contact
interface
output
pdif
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Application number
PCT/CN2016/080766
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English (en)
Chinese (zh)
Inventor
黄晓清
黄华
谢俊杰
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中兴通讯股份有限公司
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Publication of WO2016177302A1 publication Critical patent/WO2016177302A1/fr

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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

Definitions

  • This document relates to, but is not limited to, the field of signal processing technology, and in particular, to a connection device, system and method for interface multiplexing in a set top box.
  • This paper provides a connection device, system and method for interface multiplexing in a set top box, which can realize automatic identification and switching of the multiplexing interface.
  • Embodiments of the present invention provide a connection multiplexing interface device in a set top box, including: a composite video signal CVBS signal contact, a left channel signal contact, a right channel signal contact, and a signal ground contact; wherein:
  • the CVBS signal contact, the left channel signal contact, the right channel signal contact and the signal ground contact of the connecting device sequentially contact the CVBS signal contact of the analog audio and video AV interface, the left channel signal contact, and the right sound a signal signal contact and a signal ground contact;
  • the CVBS signal contact and the signal ground contact of the connecting device are sequentially connected to the S/PDIF signal contact and the signal ground contact of the digital audio S/PDIF interface, and the left channel signal contact and the right of the connecting device
  • the level of the position at which the channel signal contact is connected to the S/PDIF interface is different from the level at which the left channel signal contact and the right channel signal contact of the connection device are connected to the AV interface.
  • At least one of a position where the left channel signal contact and the right channel signal contact of the connecting device are connected to the S/PDIF cable connector is grounded.
  • connection system for interface multiplexing in a set top box including:
  • a multiplexing switch device connected to an analog audio/video AV interface or a digital audio S/PDIF interface;
  • connection device multiplexed with an interface in the set top box
  • a detecting device configured to detect whether a signal of a left channel and/or a right channel of the connection device multiplexed by the interface in the set top box is a ground signal, and obtain a detection result
  • a processor configured to output a control signal according to the detection result
  • the output device is configured to output a signal of a signal type corresponding to the control signal according to the control signal.
  • the multiplexing switch device is a second-selective multiplexing switch.
  • the processor is configured to:
  • An embodiment of the present invention provides a connection method for interface multiplexing in a set top box, including:
  • the analog audio/video AV interface or the digital audio S/PDIF interface is connected to the multiplexing switch device, detecting whether the signals of the left channel and/or the right channel of the interface device multiplexed by the interface in the set top box are grounded, and the detection result is obtained. ;
  • a signal of a signal type corresponding to the control signal is output according to the control signal.
  • the multiplexing switch device is a second-selective multiplexing switch.
  • the outputting the control signal according to the detection result includes:
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when executed by a processor.
  • the S/PDIF interface and the multiplex interface of the AV interface provided by the embodiment of the present invention automatically identify a cable corresponding to the multiplexed interface, and automatically output a corresponding signal according to the type of the inserted cable, thereby implementing automatic Switch function.
  • FIG. 1 is a schematic diagram of an AV cable connector and an S/PDIF cable connector according to an embodiment of the present invention
  • FIG. 2 is another schematic diagram of an AV cable connector and an S/PDIF cable connector according to an embodiment of the present invention
  • connection system for interface multiplexing in a set top box according to an embodiment of the present invention
  • FIG. 4 is a signal trend diagram when an AV cable is inserted into the system shown in FIG. 3;
  • FIG. 5 is a signal trend diagram of inserting an S/PDIF cable into the system shown in FIG. 3;
  • FIG. 6 is a circuit diagram of a detecting apparatus according to an embodiment of the present invention.
  • FIG. 7 is another circuit diagram of a detecting apparatus according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a method for connecting an interface multiplexing in a set top box according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a method for connecting interfaces in a set top box according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of an AV cable connector and an S/PDIF cable connector according to an embodiment of the present invention.
  • the connecting device connected to the above two connectors includes four signal contacts, which are in order from front to back: left channel, right channel, CVBS (Composite Video Broadcast Signal), ground.
  • CVBS Composite Video Broadcast Signal
  • the left channel, the right channel, the CVBS, and the ground are in the order from front to back;
  • S/PDIF cable connectors in the order from front to back: floating, ground, S/PDIF Land.
  • FIG. 2 is a schematic diagram of another AV cable connector and an S/PDIF cable connector according to an embodiment of the present invention.
  • the connecting means connected to the above two connectors includes four signal contacts, which are sequentially in order from front to back: CVBS, right channel, left channel, ground.
  • CVBS right channel, left channel, ground
  • S/PDIF cable connectors in order from front to back: S/PDIF, dangling, Earth and earth.
  • Embodiments of the present invention provide a connection device for interface multiplexing in a set top box, including: a CVBS signal contact, a left channel signal contact, a right channel signal contact, and a signal ground contact; wherein:
  • the CVBS signal contact, the left channel signal contact, the right channel signal contact, and the signal ground contact of the device are sequentially connected to the CVBS signal contact, the left channel signal contact, and the right channel signal contact of the AV interface.
  • Connected to the signal ground contact; and, the CVBS signal contact and the signal ground contact of the device are in turn
  • the level of the S/PDIF signal contact and the signal ground contact of the S/PDIF interface, and the position of the left channel signal contact and the right channel signal contact of the device connected to the S/PDIF interface The left channel signal contact and the right channel signal contact of the device are connected to the AV interface at different levels.
  • connection device when connected to the AV interface or the S/PDIF interface, the level value when the left channel interface and the right channel interface of the connection device are connected to the AV interface and the S/PDIF interface Differently, the identification of the above two interfaces is realized, thereby realizing automatic recognition of the interface when the interface is multiplexed.
  • An embodiment of the present invention provides a connection multiplexing device in a set top box, which is used for multiplexing S/PDIF and AV interfaces on a set top box, and outputs corresponding signals through an output female socket, wherein the output female socket includes CVBS signal contact, left channel signal contact, right channel signal contact, and signal ground contact, where:
  • the CVBS signal contacts of the output socket are respectively connected to the CVBS signal contacts of the AV cable connector or the S/PDIF signal contacts of the S/PDIF cable connector;
  • the signal ground contacts of the output socket are respectively connected to the ground signal contacts of the AV cable connector or the ground signal contacts of the S/PDIF cable connector;
  • the left channel signal and the right channel signal of the AV cable connector are connected in one-to-one correspondence with the left channel signal contact and the right channel signal contact of the output socket; the S/PDIF cable connector and the output socket At least one of the positions where the left channel signal contact and the right channel signal contact are connected is grounded.
  • the above two interfaces are multiplexed by two switches, and the corresponding signals are output through the same female socket, wherein the output female socket adopts the industry-standard 4-segment earphone socket to realize the distinction between different interfaces.
  • FIG. 3 is a structural diagram of a connection system for interface multiplexing in a set top box according to an embodiment of the present invention. include:
  • a multiplexing switch device connected to an AV interface or an S/PDIF interface
  • connection device multiplexed with an interface in the set top box
  • a detecting device configured to detect whether a signal of a left channel and/or a right channel of the connection device multiplexed by the interface is grounded, and obtain a detection result
  • a processor configured to output a control signal according to the detection result
  • the output device is configured to output a signal of a signal type corresponding to the control signal according to the control signal.
  • the system provided by the embodiment of the invention connects the AV interface or the S/PDIF interface through the multiplexing switch device, and the connection device multiplexed by the interface can conveniently identify the currently used interface by using different internal connections, and then detect whether the grounding is performed by the detecting device.
  • the currently used interface is identified, and then the processor outputs a control signal according to the detection result, and then outputs a corresponding type of signal through the output device.
  • the multiplexing switch device is a second-selective multiplexing switch.
  • processor is set to:
  • FIG. 4 is a signal trend diagram when an AV cable is inserted into the system shown in FIG. 3.
  • the detecting circuit detects that the AUDIO_R signal is not a ground signal, and the detecting circuit outputs a 0 level (low level) signal to the CPU, and then controls the second selection.
  • the switch selects the CVBS channel to realize automatic identification and switching of the set top box.
  • Figure 5 is a signal flow diagram of the S/PDIF cable inserted in the system of Figure 3.
  • the detecting circuit detects that the AUDIO_R signal is a ground signal, and the detecting circuit outputs a 1-level (high level) signal to the CPU, and then controls two. Select a switch to select the S/PDIF channel to realize automatic identification and switching of the set-top box.
  • FIG. 6 is a circuit diagram of a detecting apparatus according to an embodiment of the present invention.
  • the transistor is turned on or off to output high or low level: VT1 is an ordinary triode.
  • the resistance value can make the base-emitter of the triode positively biased (the voltage difference is greater than the PN junction conduction voltage), and the base-emitter PN junction is turned on, the base voltage is pulled low, and the base-set Electrode reverse bias, at this time the triode Pass, CPU_GPIO is pulled low.
  • the input signal AUDIO_R is the ground signal
  • the base-emitter of this transistor is reverse biased, the transistor is turned off, and the CPU_GPIO output is high.
  • FIG. 7 is a circuit diagram of another detecting apparatus according to an embodiment of the present invention.
  • the transistor is turned on or off.
  • the PN of the base-emitter is forward-biased or reverse-biased, so that the transistor is turned on or off, so that the CPU_GPIO output is A high level or a low level is sent to the CPU as detection information.
  • FIG. 8 is a flowchart of a method for connecting an interface multiplexing in a set top box according to an embodiment of the present invention. With reference to the contents shown in Figures 1 to 7, the method includes:
  • Step 801 After connecting the AV interface or the S/PDIF interface on the multiplexing switch device, detecting whether the signals of the left channel and/or the right channel of the connecting device are grounded, and obtaining a detection result;
  • Step 802 Output a control signal according to the detection result.
  • Step 803 Output a signal of a signal type corresponding to the control signal according to the control signal.
  • the multiplexing switch device is a second-selective multiplexing switch.
  • FIG. 9 is a schematic flowchart of a method for connecting interfaces in a set top box according to an embodiment of the present invention.
  • the outputting the control signal according to the detection result includes:
  • the internal detection circuit of the set top box detects the left channel or the right channel signal at the multiplexed interface socket, detects whether the signal is grounded, and sends detection information to the set top box main control CPU, and the CPU according to the detection information provided by the detection circuit
  • the second selection of the multiplexing switch is controlled: when the signal is not detected to be grounded, the CPU controls the multiplexing switch to output the CVBS signal. When the ground is detected, the CPU controls the multiplexing switch to output the S/PDIF signal.
  • the set top box can automatically recognize the inserted cable, and automatically output a corresponding signal according to the type of the inserted cable, thereby realizing the automatic switching function.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. Instructions to achieve their corresponding functions. This application is not limited to any specific combination of hardware and software.
  • the set top box can automatically identify the inserted AV cable or the S/PDIF cable, and automatically output a corresponding signal according to the type of the inserted cable, thereby implementing an automatic switching function.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

L'invention concerne un dispositif de connexion pour un multiplexage d'interface dans un décodeur, le dispositif de connexion comprenant : un contact de signal de diffusion vidéo composite (CVBS), un contact de signal de canal gauche, un contact de signal de canal droit, et un contact de mise à la terre de signal. Le contact de signal CVBS, le contact de signal de canal gauche, le contact de signal de canal droit, et le contact de mise à la terre de signal du dispositif de connexion sont connectés séquentiellement à un contact de signal CVBS, à un contact de signal de canal gauche, à un contact de signal de canal droit, et à un contact de mise à la terre de signal d'une interface audio et vidéo (AV) analogique. Le contact de signal CVBS et le contact de signal de mise à la terre du dispositif de connexion sont connectés séquentiellement à un contact de signal de format d'interconnexion numérique Sony/Philips (S/PDIF) et à un contact de mise à la terre de signal d'une interface S/PDIF audio numérique, et un niveau de tension au niveau d'une position où le contact de signal de canal gauche et le contact de signal de canal droit du dispositif de connexion sont connectés à l'interface S/PDIF est différent d'un niveau de tension au niveau d'une position où le contact de signal de canal gauche et le contact de signal de canal droit du dispositif de connexion sont connectés à l'interface AV.
PCT/CN2016/080766 2015-05-05 2016-04-29 Dispositif, système et procédé de connexion pour un multiplexage d'interface dans un décodeur WO2016177302A1 (fr)

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CN201510225274.5 2015-05-05
CN201510225274.5A CN106210880A (zh) 2015-05-05 2015-05-05 一种机顶盒中接口复用的连接装置、系统和方法

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