WO2009130784A1 - Système de reproduction de contenus - Google Patents

Système de reproduction de contenus Download PDF

Info

Publication number
WO2009130784A1
WO2009130784A1 PCT/JP2008/058023 JP2008058023W WO2009130784A1 WO 2009130784 A1 WO2009130784 A1 WO 2009130784A1 JP 2008058023 W JP2008058023 W JP 2008058023W WO 2009130784 A1 WO2009130784 A1 WO 2009130784A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
unit
output
transmission
content
Prior art date
Application number
PCT/JP2008/058023
Other languages
English (en)
Japanese (ja)
Inventor
章公 辻
健 森
弘 河野
浩和 猪谷
Original Assignee
パイオニア株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2008/058023 priority Critical patent/WO2009130784A1/fr
Priority to JP2010509011A priority patent/JPWO2009130784A1/ja
Publication of WO2009130784A1 publication Critical patent/WO2009130784A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
    • 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
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
    • H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
    • 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
    • H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
    • H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
    • 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
    • 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
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • 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
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver

Definitions

  • the present invention relates to a content reproduction system for reproducing video and audio.
  • a content reproduction system including a transmitter (player) that provides content via a digital interface such as HDMI (High Definition Multimedia Interface) and a receiver (receiver) that receives and outputs the content is known.
  • a transmitter player
  • a digital interface such as HDMI (High Definition Multimedia Interface)
  • a receiver receiver
  • Patent Document 1 discloses that a receiving apparatus that reproduces video does not output sound that hinders audio reproduction of the receiving apparatus that reproduces audio, and has two HDMI output connectors to reproduce the video.
  • the receiving apparatus describes a transmitting apparatus that transmits a streaming signal having no audio data.
  • Other related techniques are described in Patent Document 2 and Patent Document 3.
  • An object of the present invention is to realize a transmission device capable of reducing noise of an audio signal caused by high-frequency transmission and improving sound quality by minimizing the transmission frequency of the audio signal and the video signal. To do.
  • the content signal including the audio signal and the video signal is received through the digital interface, and at least the first receiving unit for outputting the video signal and the second reception for outputting the audio signal.
  • a second output unit that is the same standard, can output both an audio signal and a video signal, and transmits the content signal to the second receiving unit;
  • a control unit that controls the plurality of output units so that a signal transmitted from the first output unit and a signal transmitted from the second output unit are simultaneously transmitted at different transmission frequencies, respectively.
  • a transmission device at least a first reception unit for outputting a video signal, and a second reception unit for outputting an audio signal.
  • a content reproduction system for transmitting and receiving a content signal including a video signal, wherein the transmission device is capable of outputting both an audio signal and a video signal, and transmits the content signal to the first receiving unit.
  • a second output unit that is the same standard as the first output unit, can output both an audio signal and a video signal, and transmits the content signal to the second receiving unit;
  • the plurality of output units are controlled so that each of the content signals is simultaneously transmitted at different transmission frequencies, and an audio signal is transmitted to the first receiving unit.
  • a control unit that transmits a live prohibition instruction and transmits a video signal reproduction prohibition instruction to the second reception unit, and the first and second reception units receive the content signal and the content from the transmission device, respectively.
  • a reception unit that receives a reproduction prohibition instruction; and a reproduction unit that reproduces an audio signal and / or a video signal included in the content signal, wherein each of the reproduction units has received the reproduction prohibition instruction of the video signal.
  • a content signal including an audio signal and a video signal, at least a first reception unit for outputting a video signal, and a second reception unit for outputting an audio signal through a digital interface.
  • a first output unit that can output both an audio signal and a video signal, and transmits the content signal to the first receiving unit; and the same as the first output unit
  • a second output unit for transmitting the content signal to the second receiving unit, a signal transmitted from the first output unit, and a second signal.
  • a control unit that controls the plurality of output units so as to simultaneously transmit signals transmitted from the output units at different transmission frequencies.
  • the above transmitting apparatus is connected to a plurality of receiving units through a digital interface through a cable compliant with HDMI or the like, and has a plurality of output units and a control unit.
  • Each of the first receiving unit and the second receiving unit represents one receiving device, a circuit having a receiving function, or one or a plurality of hardware or software for realizing the receiving function. Therefore, the first receiving unit and the second receiving unit are realized by one receiving device or separate receiving devices.
  • the first output unit transmits a content signal including an audio signal and a video signal to the first receiving unit.
  • the second output unit can transmit the content signal based on the same transmission standard as the first output unit, and the content signal transmitted by the first output unit and the same content signal optimized for the transmission frequency are transmitted. Transmit to the second receiving unit.
  • the “same standard” means that the transmission system (standard) is the same regardless of the shape of the terminal (plug) connected to the cable. Therefore, HDMI and IEEE 1394 are not the same standard.
  • HDMI is classified into A type, B type, and C type according to the type of plug (or connector) in the version of the standard at the present stage.
  • the first output unit and the second output unit do not depend on the type of interface that is the output destination. That is, the interface for transmitting the content signal output from the first or second output unit to the outside of the transmitting device may be a terminal that can be connected to a cable with the same transmission standard, or wireless communication is possible. A simple adapter may be used.
  • the control unit controls the above-described plurality of output units so that the content signals are simultaneously transmitted at different transmission frequencies.
  • the transmission device can minimize the transmission frequency for transmitting the audio signal and the transmission frequency for transmitting the video signal even when transmitting high-quality video. it can. Therefore, the transmission apparatus can reduce noise caused by high-frequency transmission and improve sound quality.
  • the control unit sets the transmission frequency of the output unit having the first reception unit as a transmission destination as the minimum frequency of the video signal included in the content signal, and the second The transmission frequency of the output unit having the reception unit as the transmission destination is set as the minimum frequency required for the audio signal included in the content signal.
  • the transmission apparatus can minimize the transmission frequency for transmitting the audio signal and the transmission frequency for transmitting the video signal, respectively.
  • control unit uses the audio signal output from the first output unit as a silence signal and the video signal output from the second output unit as a black signal. This is a mask signal. In this way, it is possible to prevent a plurality of receiving units from outputting the same audio and video.
  • the transmitter further includes an input unit that receives an input from the outside, and the control unit is an output unit that uses the first reception unit as a transmission destination based on the input from the input unit. And an output unit having the second receiving unit as a transmission destination. Accordingly, the control unit can control the output unit to transmit the content signal according to an appropriate transmission frequency.
  • control unit sets the first reception unit as a transmission destination based on a control signal received from the first reception unit and / or the second reception unit. An output unit and an output unit having the second receiving unit as a transmission destination are determined. Also according to this aspect, the control unit can control the output unit to transmit the content signal according to an appropriate transmission frequency.
  • a transmission apparatus a first reception unit for outputting at least a video signal, and a second reception unit for outputting an audio signal
  • a content reproduction system for transmitting and receiving a content signal including a signal, wherein the transmission device can output both an audio signal and a video signal, and transmits the content signal to the first receiving unit.
  • An output unit, and a second output unit that is the same standard as the first output unit, can output both an audio signal and a video signal, and transmits the content signal to the second receiving unit; Control the plurality of output units so that the content signals are transmitted simultaneously at different transmission frequencies, and the audio signal is retransmitted to the first receiving unit.
  • a control unit that transmits a prohibition instruction and transmits a reproduction prohibition instruction of a video signal to the second reception unit, wherein the first and second reception units receive the content signal and the reproduction from the transmission device.
  • a reception unit that receives a prohibition instruction; and a reproduction unit that reproduces an audio signal and / or a video signal included in the content signal, each of the reproduction units receiving a reproduction prohibition instruction for the video signal Only the audio signal is reproduced, and only the video signal is reproduced when an instruction to prohibit reproduction of the audio signal is received.
  • the first receiving unit performs video playback
  • the second receiving unit performs audio playback
  • the transmission device includes a first output unit, a second output unit, and a control unit.
  • the first output unit transmits a content signal including an audio signal and a video signal to the first receiving unit.
  • the second output unit can transmit the content signal based on the same transmission standard as the first output unit, and the content signal transmitted by the first output unit and the same content signal optimized for the transmission frequency are transmitted. Transmit to the second receiving unit.
  • the “same standard” means that the transmission system (standard) is the same regardless of the shape of the terminal (plug) connected to the cable. Therefore, HDMI and IEEE 1394 are not the same standard.
  • HDMI is classified into A type, B type, and C type according to the type of plug (or connector) in the version of the standard at the present stage.
  • the first output unit and the second output unit do not depend on the type of interface that is the output destination. That is, the interface for transmitting the content signal output from the first or second output unit to the outside of the transmitting device may be a terminal that can be connected to a cable with the same transmission standard, or wireless communication is possible. A simple adapter may be used.
  • the control unit controls the first output unit and the second output unit so that the content signals are simultaneously transmitted at different transmission frequencies.
  • the control unit transmits a content signal and an audio signal reproduction prohibition instruction to the first receiving unit that performs video reproduction.
  • a content signal is transmitted at a transmission frequency different from that of the first reception unit, and a video signal reproduction prohibition instruction is transmitted to the second reception unit that performs audio reproduction.
  • the first and second receiving units reproduce the content signal in accordance with the received reproduction prohibition instruction.
  • the content reproduction system can set the transmission frequency of the audio signal and the transmission frequency of the video signal to transmission frequencies suitable for each transmission, reduce noise caused by high-frequency transmission, Sound quality can be improved.
  • the transmission standard to which the first and second output units comply is HDMI.
  • the transmission apparatus can reduce noise caused by high-frequency transmission of HDMI and improve sound quality.
  • FIG. 1 shows a reproduction system (hereinafter referred to as “content reproduction system”) of a reproduction signal (hereinafter referred to as “content signal”) including a video signal, an audio signal, or both in the first embodiment.
  • content reproduction system includes a transmission device 100, a first reception device 200, and a second reception device 300.
  • functions and configurations of these will be described.
  • the transmission device 100 is a device that transmits content signals to the reception devices 200 and 300.
  • the transmission device 100 corresponds to, for example, a DVD player, a Blu-ray player, or the like.
  • the transmission device 100 is connected to the first reception device 200 by a cable compliant with a multimedia interface standard such as HDMI or IEEE 1394 that can simultaneously transmit a video signal and an audio signal.
  • the transmission device 100 is connected to the second reception device 200 via a cable conforming to HDMI or the like.
  • the transmission device 100 performs communication based on HDMI to the first reception device 200 and the second reception device 300.
  • the transmission apparatus 100 includes a control unit 101, a decoding unit 102, a first output unit 103, a second output unit 104, a first interface 130, and a second interface 140.
  • the control unit 101 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory) (not shown), and performs overall control of the transmission apparatus 100.
  • the control unit 101 transmits information Sd (hereinafter, “output information Sd”) about the frequency (hereinafter referred to as “transmission frequency”) for transmitting the content signal to the first output unit 103 and the second output unit 104. Called).
  • the decoding unit 102 decodes the content.
  • the decoding unit 102 reads content stored by an auxiliary storage unit such as a hard disk (not shown) or the like, or content transmitted from another device (not shown) that is electromagnetically connected to the transmission device 100.
  • the audio signal included in the content is referred to as “audio signal Sa”
  • the video signal is referred to as “video signal Sv”.
  • the decoding unit 102 transmits the video signal Sv and the audio signal Sa generated by decoding the content to the first output unit 103 and the second output unit 104, respectively.
  • the decoding unit 102 notifies the control unit 101 of the specifications of the video signal Sv and the audio signal Sa, for example, whether the video is 1080p.
  • “1080p” represents a progressive scan video image with 1080 lines (1125 total scan lines) and a frame frequency of 59.94 Hz.
  • the first output unit 103 performs processing necessary for communicating with other devices via the first interface 130.
  • the first output unit 103 performs the video signal Sv and the audio signal Sa received from the decoding unit 102 in accordance with a predetermined transmission frequency f1 (hereinafter referred to as “first transmission frequency f1”). 1 to the first receiving device 200.
  • the second output unit 104 executes processing necessary for communicating with other devices via the second interface 140.
  • the second output unit 104 uses the video signal Sv and the audio signal Sa received from the decoding unit 102 in accordance with a predetermined transmission frequency f2 (hereinafter referred to as “second transmission frequency f2”). 2 to the receiving device 300.
  • the first interface 130 and the second interface 140 are interfaces (plugs) that can be connected to a cable conforming to a predetermined standard such as HDMI, and transmit / receive content signals, EDID (Extended display identification data), and CEC. Control signals such as (Consumer Electronics Control) are transmitted and received.
  • control signal C1 the control signal communicated by the first interface 130
  • control signal C2 the control signal communicated by the second interface 140
  • the first interface 130 is electromagnetically connected to the interface 210 of the first receiving device 200 via a cable compliant with HDMI
  • the second interface 140 is connected to the second receiving device 300.
  • the interface 310 is electromagnetically connected via an HDMI-compliant cable.
  • the first receiving device 200 receives the video signal Sv and the audio signal Sa from the transmitting device 100 and reproduces the video signal Sv.
  • the first receiving device 200 includes an input unit 201, a video output unit 202, and an interface 210.
  • the first receiving device 200 corresponds to, for example, a plasma television.
  • the input unit 201 receives the content signal transmitted from the transmission device 100 via the interface 210. Then, the input unit 201 supplies the video signal Sv among the received content signals to the video output unit 202.
  • the video output unit 202 corresponds to a display or the like, and displays a video according to the supplied video signal Sv.
  • the first receiving device 200 has an audio output capability, but does not output audio.
  • the second receiving device 300 receives the video signal Sv and the audio signal Sa from the transmitting device 100, and reproduces the audio signal Sa.
  • the second receiving apparatus 300 corresponds to, for example, an AV receiver.
  • the second receiving device 300 includes an input unit 301 and an interface 310.
  • the input unit 301 receives the content signal transmitted from the transmission device 100 via the interface 310. Then, the input unit 301 supplies the audio signal Sa among the received content signals to the audio output device 350.
  • the second receiving device 300 has a video output capability, but does not output a video.
  • the audio output device 350 receives the audio signal Sa supplied from the second receiving device 300 and outputs (reproduces) the audio signal Sa.
  • the sound output device 350 corresponds to, for example, a speaker.
  • the second receiving device 300 may include an audio output device 350.
  • the second receiving device 300 and the audio output device 350 are realized by a single device.
  • the audio output device 350 receives the audio signal Sa from the input unit 301 through a bus in the second receiving device 300, for example.
  • the video frequency “Ax” (“x” is a positive number) represents the lowest frequency (hereinafter referred to as “required minimum video frequency”) necessary to transmit the video signal Sv of each specification. . Further, Ax represents a higher frequency as the value of “x” is higher. Similarly, the audio frequency “ax” represents the lowest frequency (hereinafter referred to as “required minimum audio frequency”) necessary for the transmitting apparatus 100 to transmit the audio signal Sa of each specification. It is assumed that ax represents a higher frequency as the value of “x” is higher.
  • the transmission is based on the transmission frequency of the video signal Sv (hereinafter referred to as “video superior case”), and the transmission frequency of the audio signal Sa is used as a reference.
  • video superior case the necessary minimum video frequency Ax is set as the transmission frequency, and the video signal Sv and the audio signal Sa are transmitted at the transmission frequency.
  • audio superior case the necessary minimum audio frequency ax is set as the transmission frequency, and the video signal Sv and the audio signal Sa are transmitted at the transmission frequency.
  • a set of a required minimum video frequency and a required minimum audio frequency used by the transmission apparatus 100 is determined in advance.
  • a set of a required minimum video frequency and a required minimum audio frequency that can be used by the transmission apparatus 100 is expressed as a frequency set (Ax, ax).
  • the necessary minimum video frequency Ax is set to a value equal to or higher than the necessary minimum audio frequency ax
  • the necessary minimum video frequency Ax is set to a value equal to or lower than the necessary minimum video frequency ax.
  • the control unit 101 of the transmitting apparatus 100 When the output of the video signal Sv and the output of the audio signal Sa are performed by different receiving apparatuses as in the content reproduction system shown in FIG. 1, the control unit 101 of the transmitting apparatus 100 generally has a first transmission frequency. It is conceivable to make f1 and the second transmission frequency f2 the same (hereinafter referred to as “comparative example”). However, in general, the transmission frequency necessary for transmitting the video signal Sv is different from the transmission frequency necessary for transmitting the audio signal Sa. Therefore, for example, in the case of a video superior case, the transmission device 100 transmits the audio signal Sa at a transmission frequency that is faster than necessary.
  • the receiving apparatus 300 that reproduces the audio signal Sa receives the audio signal Sa at a transmission frequency higher than necessary, the receiving apparatus 300 is strongly influenced by noise due to unnecessary radiation and the like, and the noise is generated when the signal on the receiving side is restored. It may adversely affect the playback sound quality.
  • the transmission device 100 transmits the video signal Sv at a transmission frequency that is faster than necessary. Therefore, since the receiving device 200 that reproduces the video signal Sv receives the video signal Sv at a transmission frequency higher than necessary, the receiving device 200 is strongly affected by noise due to unnecessary radiation and the like, and the noise is generated when the signal on the receiving side is restored. It may adversely affect the playback image quality.
  • the control unit 101 controls the first output unit 103 and the second output unit 104 to output content signals at different transmission frequencies. That is, the control unit 101 sets the first transmission frequency f1 and the second transmission frequency f2 according to whether the first reception device 200 and the second reception device 300 reproduce audio or video. Set each to the minimum frequency required. This will be described in detail below.
  • the control unit 101 provides the first output unit 103 with information Sd (hereinafter referred to as “output”) indicating whether to output (transmit) the video signal Sv and the audio signal Sa based on the minimum required video frequency or the minimum required audio frequency. Information Sd ").
  • the first output unit 103 is connected to the first receiving device 200 that reproduces video. Therefore, the control unit 101 transmits output information Sd indicating that the first transmission frequency f1 is determined based on the necessary minimum video frequency to the first output unit 103.
  • the control unit 101 transmits to the first output unit 103 the first transmission frequency f1 determined based on the necessary minimum video frequency as output information Sd.
  • the transmitting apparatus 100 transmits the video signal Sv to the first receiving apparatus 200 at the minimum transmission frequency necessary for transmitting the video signal Sv even in the audio superior case. Can do. Therefore, the transmission device 100 can reduce the influence of noise generated in the video signal Sv due to the transmission of the video signal Sv at a transmission frequency higher than necessary.
  • the first receiving device 200 receives the audio signal Sa even though it does not output audio. Therefore, the first receiving apparatus 200 needs to be controlled so as not to reproduce the received audio signal Sa.
  • the user may operate the first receiving device 200 and stop outputting the sound.
  • the transmission apparatus 100 may give the first reception apparatus 200 a control signal C1 including an instruction to stop outputting audio.
  • the first receiving device 100 may replace the audio signal Sa transmitted by the first output unit 103 with a silence signal. By any of these, the transmission apparatus 100 can stop outputting the sound when the first receiving apparatus 200 can also reproduce the sound.
  • the control unit 101 transmits output information Sd to the second output unit 104 to determine the second transmission frequency f2 based on the necessary minimum audio frequency.
  • the control unit 101 transmits, as output information Sd, the second transmission frequency f2 determined based on the necessary minimum audio frequency to the second output unit 104.
  • the transmitting apparatus 100 transmits the audio signal Sa to the second receiving apparatus 300 at the minimum transmission frequency necessary for transmitting the audio signal Sa even in the video superior case. Can do. Therefore, the transmission device 100 can reduce the influence of noise generated in the audio signal Sa due to the transmission of the audio signal Sa at a transmission frequency higher than necessary.
  • the second receiving device 300 receives the video signal Sv even though it does not output the video. Therefore, the second receiving device 300 needs to be controlled so as not to reproduce the received video signal Sv.
  • the user may operate the second receiving device 300 to stop the output of the video.
  • the transmission device 100 may give the second reception device 300 a control signal C2 including an instruction to stop video output.
  • the first receiving apparatus 100 uses the video signal Sv transmitted by the second output unit 103 as a video signal indicating a single color screen such as black (hereinafter referred to as “black mask signal”). .). Accordingly, the transmission device 100 can stop the output of the video when the second reception device 300 can also reproduce the video.
  • the control unit 101 determines the output information Sd by input from the user. Specifically, the control unit 101 receives an input from the user that the first receiving device 200 reproduces the video and the second receiving device 300 reproduces the audio. Output information Sd is notified to the output unit 103 and the second output unit 104.
  • the transmission device 100 separately includes an input unit such as a button or a touch panel (not shown) on the outer surface, and enables input from the user.
  • control unit 101 may determine the output information Sd based on the control signal C1 transmitted from the first receiving device 200 and the control signal C2 transmitted from the second receiving device 300.
  • the transmission apparatus 100 uses the CEC channel, for example, to the first reception apparatus 200 and the second reception apparatus 300 as to whether or not they are audio reproduction dedicated devices or video reproduction dedicated devices. To get. Then, the transmission frequency is determined based on the necessary minimum audio frequency for the audio reproduction dedicated device, and the transmission frequency is determined based on the necessary minimum video frequency for the video reproduction dedicated device.
  • FIG. 2 is an example of a table showing the relationship among the transmission frequency, the required minimum video frequency, and the required minimum audio frequency in the video superior case.
  • “Output 1” in the table represents an output at the first interface 130
  • “Output 2” represents an output at the second interface 140. That is, the transmission frequency of output 1 indicates the first transmission frequency f1, and the transmission frequency of output 2 indicates the second transmission frequency f2.
  • FIG. 2 (a) shows that in the video superior case, when the user desires to view by the frequency set (A1, a3), that is, the required video frequency, not the required audio frequency, determines the transmission frequency for the format to be reproduced.
  • Tables corresponding respectively to the first example and the comparative example in the case of the target are shown.
  • the transmission frequency at the output 2 originally transmits the audio signal Sa. Is greater than the frequency required. That is, the necessary minimum frequency for transmitting the audio signal Sa is a1, but since the transmission frequency is adjusted to the necessary minimum video frequency, the output 2 transmits the audio signal Sa at a transmission frequency higher than necessary. Become.
  • the transmitting apparatus 100 reproduces the contents that the respective output destination receiving apparatuses reproduce the first transmission frequency f1 and the second transmission frequency f2, that is, the audio. Or set according to whether to play the video. Therefore, the transmitting apparatus 100 sets the necessary minimum video frequency A3 corresponding to the necessary minimum audio frequency a3 to the transmission frequency of output 2, and transmits the video signal Sv and the audio signal Sa to the second receiving apparatus 300. Thereby, the transmission device 100 can suppress the second transmission frequency f2 to the lowest frequency necessary for transmitting the audio signal Sa, and noise generated in the audio signal Sa in the second reception device 300 can be reduced. Can be reduced.
  • the transmission device 100 may replace the video signal Sv transmitted to the second reception device 300 with a black mask signal.
  • the second receiving device 300 may discard the received video signal Sv or switch to a single color display such as black. Thereby, the second receiving device 300 is controlled not to display an image.
  • the transmission device 100 may replace the audio signal Sa transmitted to the first reception device 200 with a silence signal.
  • the first receiving device 200 may discard or mute the audio signal Sa. Thereby, the first receiving device 200 is controlled not to output sound.
  • FIG. 2 (b) shows the relationship between the transmission frequency, the required minimum video frequency, and the required minimum audio frequency when the user wants to view content with 1080p video and audio 2CH LPCM quality (specification) in the video superior case.
  • surface which shows. That is, FIG. 2B replaces the required minimum video frequency A1 with 148.5 MHz, the required minimum transmission frequency A3 corresponding to the minimum audio frequency a3 with 27 MHz, and the required minimum audio frequency a3 with 27 MHz in FIG. It is a table.
  • the transmission device 100 transmits the content signal by setting the transmission frequency of the output 1 and the transmission frequency of the output 2 to 148.5 MHz.
  • the transmission device 100 sets the transmission frequency of output 1 to 148.5 MHz and the transmission frequency of output 2 to 27 MHz. Thereby, the transmission apparatus 100 can reduce the influence of noise resulting from the high-speed transmission of the audio signal Sa.
  • FIG. 3 is an example of a table showing the relationship among the transmission frequency, the required minimum video frequency, and the required minimum audio frequency in the audio superior case.
  • FIG. 3A shows a case where the user desires to view the frequency set (A3, a1) in the audio superior case, that is, the audio frequency is not the video frequency but the transmission frequency is higher than the video frequency for the format to be reproduced.
  • surface corresponding to the 1st Example and comparative example in the case where it becomes dominant in determination is shown.
  • the transmission frequency of output 1 and the transmission frequency of output 2 are the same, so the transmission frequency at output 1 is the lowest frequency that is originally necessary for transmitting the video signal Sv. Bigger than.
  • the transmission device 100 sets the video frequency A3 to the transmission frequency of output 1, and transmits the video signal Sv and the audio signal Sa.
  • the transmission apparatus 100 can suppress the transmission frequency at the output 1 to a necessary minimum, and can reduce the occurrence of noise in the video signal Sv due to the high-frequency transmission.
  • the transmission device 100 may replace the audio signal Sa transmitted to the first reception device 200 with a silence signal.
  • the first receiving device 200 may discard the audio signal Sa or set it to mute. Thereby, the first receiving device 200 is controlled not to output sound.
  • the transmission device 100 may replace the video signal Sv transmitted to the second reception device 300 with a black mask signal.
  • the second receiving device 300 may discard the video signal Sv or switch to a single color display such as black. Thereby, the second receiving device 300 is controlled not to display an image.
  • FIG. 3B is a table showing the relationship between the transmission frequency, the required minimum video frequency, and the required minimum audio frequency when the user desires to view the content according to the quality of video 480i and audio DTS-HD Master Audio. It is an example. That is, FIG. 3B is the same as FIG. 3A, in which the required minimum transmission frequency A3 is 27 MHz when the required voice frequency is a3, the required minimum transmission frequency A1 is 54 MHz when the required voice frequency is a1, and the required minimum. It is the table
  • “480i” represents an image of an interlaced scanning method with 480 effective scanning lines (total scanning line 525) and a frame frequency of 29.97 Hz. As shown in FIG.
  • the transmission device 100 transmits the content signal with the transmission frequency of output 1 and the transmission frequency of output 2 set to 54 MHz.
  • the transmission device 100 sets the transmission frequency of output 1 to 27 MHz and the transmission frequency of output 2 to 54 MHz. That is, in the first embodiment, the transmission device 100 sets the transmission frequency to the first reception device 200 to the lowest frequency necessary for transmitting the video signal Sv. Thereby, the transmission apparatus 100 can reduce the influence of noise of the video signal Sv due to high-speed transmission.
  • FIG. 4 shows a configuration of a content reproduction system according to the second embodiment.
  • the content reproduction system includes a transmission device 100 and a reception device 400.
  • the receiving device 400 includes a first input unit 401, a second input unit 402, an interface 410, an interface 420, a video output unit 403, and an audio output unit 404.
  • the first input unit 401 receives the video signal Sv and the audio signal Sa transmitted from the first interface 130 of the transmission device 100 via the interface 410. Further, the first input unit 401 discards the audio signal Sa among the received signals and supplies the video signal Sv to the video output unit 403.
  • the video output unit 403 displays a video based on the supplied video signal Sv.
  • the second input unit 402 receives the video signal Sv and the audio signal Sa transmitted from the second interface 140 of the transmission device 100 via the interface 420. Further, the second input unit 402 discards the video signal Sv among the received signals and supplies the audio signal Sa to the audio output unit 404.
  • the audio output unit 404 outputs audio based on the supplied audio signal Sa.
  • the audio output unit 404 is arranged in the reception device 400, but may be a device (separate body) different from the reception device 400. In this case, the receiving device 400 and the audio output unit 403 are electromagnetically connected via a cable or the like.
  • the video signal Sv and the audio signal Sa received via the interface 410 are transmitted based on the video frequency. That is, the first transmission frequency f1 is determined based on the necessary minimum video frequency. Therefore, the video signal Sv is not affected by noise caused by the transmission frequency even if the audio frequency is high in the audio dominant case.
  • the video signal Sv and the audio signal Sa received via the interface 420 are transmitted based on the necessary minimum audio frequency. That is, the second transmission frequency f2 is determined based on the necessary minimum audio frequency. Therefore, the audio signal Sa is not affected by noise caused by the transmission frequency even if the video frequency is high in the video dominant case.
  • the receiving apparatus 400 supplies the video signal Sv received via the interface 410 to the video output unit 403 and supplies the audio signal Sa received via the interface 420 to the audio output unit 404, thereby providing a video superior case. Even so, it is possible to reduce the influence of noise of the audio signal Sa caused by high-speed transmission.
  • the receiving apparatus 400 can reduce the influence of the noise of the video signal Sv resulting from the high-speed transmission even in the audio superior case.
  • the transmitting apparatus is connected to the first receiving apparatus and the second receiving apparatus via a cable or the like conforming to HDMI, and the first and second interfaces, And a second output unit and a control unit.
  • the first output unit supplies content to the first interface according to the first transmission frequency.
  • the second output unit supplies the content to the second interface according to the second transmission frequency.
  • the control unit notifies the first and second output units of output information indicating whether the first and second transmission frequencies should be determined based on the minimum required audio frequency or the minimum required video frequency.
  • the transmission device can suppress the transmission frequency for transmitting the audio signal even when transmitting a high-quality video. Therefore, the transmission apparatus can reduce noise caused by high-frequency transmission and improve sound quality. Further, the transmission device can suppress the transmission frequency for transmitting the video signal even when transmitting high-quality audio. Therefore, the transmission device can reduce noise caused by high-frequency transmission and improve image quality.
  • the content playback system has two systems, a system (line) for transmitting and reproducing audio signals and a system for transmitting and reproducing video signals.
  • the configuration to which the present invention is applicable is not limited to this.
  • the content reproduction system may have a configuration including three or more systems (hereinafter referred to as “content reproduction system according to a modification”).
  • the content reproduction system according to the modification has at least a system for transmitting and reproducing an audio signal and a system for transmitting and reproducing a video signal.
  • the transmission device 100 includes a third output unit that transmits a content signal in addition to the first output unit 103 and the second output unit 104, and includes a third output unit.
  • the receiving apparatus receives the content signal output by the third output unit, and reproduces the video signal or the audio signal.
  • the present invention can be used in a content reproduction system that transmits and reproduces content between multiple devices.

Landscapes

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

Abstract

L'invention concerne un dispositif de transmission connecté à une pluralité d'unités de réception à l'aide de câbles, etc. conformes à la norme HDMI ou similaire par l'intermédiaire d'une interface numérique, et comprenant une pluralité de parties de sortie et une partie de régulation. La première partie de sortie transmet un signal de contenu contenant un signal audio et un signal vidéo à la première unité de réception. La seconde partie de sortie est en mesure de transmettre un signal de contenu basé sur la même norme de transmission que celle utilisée par la première partie de sortie, et transmet le même signal de contenu que celui transmis de la première partie de sortie à la seconde unité de réception. La partie de régulation régule la pluralité de parties de sortie de sorte que ces parties de sortie peuvent transmettre simultanément le signal de contenu sur des fréquences de transmission différentes. Grâce à cette structure, le dispositif de transmission peut minimiser la fréquence de transmission pour transmettre des signaux audio et la fréquence de transmission pour transmettre des signaux vidéo même s'il transmet des vidéos de grande qualité. Par conséquent, on peut réduire le bruit attribuable à la transmission haute fréquence du dispositif de transmission et on peut également en amélioré la qualité sonore.
PCT/JP2008/058023 2008-04-25 2008-04-25 Système de reproduction de contenus WO2009130784A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2008/058023 WO2009130784A1 (fr) 2008-04-25 2008-04-25 Système de reproduction de contenus
JP2010509011A JPWO2009130784A1 (ja) 2008-04-25 2008-04-25 コンテンツ再生システム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/058023 WO2009130784A1 (fr) 2008-04-25 2008-04-25 Système de reproduction de contenus

Publications (1)

Publication Number Publication Date
WO2009130784A1 true WO2009130784A1 (fr) 2009-10-29

Family

ID=41216533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/058023 WO2009130784A1 (fr) 2008-04-25 2008-04-25 Système de reproduction de contenus

Country Status (2)

Country Link
JP (1) JPWO2009130784A1 (fr)
WO (1) WO2009130784A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013229685A (ja) * 2012-04-24 2013-11-07 Sony Corp 情報処理装置、情報処理方法及びプログラム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005057714A (ja) * 2003-07-31 2005-03-03 Toshiba Corp 送信機器及び送信方法
JP2006311288A (ja) * 2005-04-28 2006-11-09 Sony Corp オーディオ中継装置及びオーディオ中継方法
JP2007174239A (ja) * 2005-12-21 2007-07-05 Sony Corp 光伝送システム、信号伝送装置、光伝送方法、信号伝送装置の制御方法、制御プログラム
JP2007258867A (ja) * 2006-03-22 2007-10-04 Kenwood Corp Ａｖソース装置およびａｖ再生システム

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09162785A (ja) * 1995-12-08 1997-06-20 Matsushita Electric Ind Co Ltd 音声通信端末装置および音声通信方法
JP2005018291A (ja) * 2003-06-24 2005-01-20 Fuji Xerox Co Ltd 画像信号伝送装置及び情報処置装置
JP2007194845A (ja) * 2006-01-18 2007-08-02 Sony Corp コンテンツ再生システム及びコンテンツ再生方法
JP4035154B1 (ja) * 2007-08-30 2008-01-16 松下電器産業株式会社 映像音出力装置、及び外部スピーカ制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005057714A (ja) * 2003-07-31 2005-03-03 Toshiba Corp 送信機器及び送信方法
JP2006311288A (ja) * 2005-04-28 2006-11-09 Sony Corp オーディオ中継装置及びオーディオ中継方法
JP2007174239A (ja) * 2005-12-21 2007-07-05 Sony Corp 光伝送システム、信号伝送装置、光伝送方法、信号伝送装置の制御方法、制御プログラム
JP2007258867A (ja) * 2006-03-22 2007-10-04 Kenwood Corp Ａｖソース装置およびａｖ再生システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013229685A (ja) * 2012-04-24 2013-11-07 Sony Corp 情報処理装置、情報処理方法及びプログラム

Also Published As

Publication number Publication date
JPWO2009130784A1 (ja) 2011-08-11

Similar Documents

Publication Publication Date Title
US8446533B2 (en) Television apparatus and method for controlling the same
US8214730B2 (en) System and method for digital signal transmission with reduced error rate
EP1936990A2 (fr) Appareil de réception de diffusion numérique et son procédé de synchronisation
JP2014515202A (ja) 接続デバイスによる使用のためのマルチメディア・データストリームの変換
JP2009130606A (ja) インターフェース回路
JP2009100412A (ja) 映像伝送装置、映像送信装置および映像受信装置
JP4652302B2 (ja) 音声再生装置、映像音声再生装置、及びその音場モード切り替え方法
US20150103253A1 (en) Device control apparatus and device control method
JP4785989B2 (ja) 映像音声送信装置および映像音声受信装置
US12003886B2 (en) Transmission device, transmission method, reception device, and reception method
US20080240682A1 (en) Sound playback apparatus
US10728467B2 (en) Audio/video output device
WO2016052187A1 (fr) Dispositif et procédé d'émission, dispositif et procédé de réception
JP2008035399A (ja) 映像音声再生システム及び映像音声再生方法
JP2009027678A (ja) 音声出力装置、音声入力装置、音声制御装置、音声制御システム及び音声制御方法
JP5291532B2 (ja) Ａｖシステム、オーディオシステム及び映像表示装置
WO2009130784A1 (fr) Système de reproduction de contenus
JP4837018B2 (ja) Ａｖ装置
JP4611951B2 (ja) 音声再生装置、映像音声再生装置、及びその音場モード切り替え方法
JP2008067279A (ja) 音声再生装置、映像音声再生装置、及びその音場モード切り替え方法
JP4596087B2 (ja) インターフェース回路
WO2019225449A1 (fr) Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception
WO2019225448A1 (fr) Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception
JP6669071B2 (ja) 送信装置、送信方法、受信装置および受信方法
WO2024116449A1 (fr) Dispositif de reproduction audio, procédé de commande et programme

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08752097

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2010509011

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08752097

Country of ref document: EP

Kind code of ref document: A1