JP2005051547A - VIDEO / AUDIO OUTPUT DEVICE, VIDEO / AUDIO RECEIVER, VIDEO / AUDIO OUTPUT METHOD, VIDEO / AUDIO RECEPTION METHOD, AND COMPUTER PROGRAM - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize an apparatus that can cope with a plurality of types of input / output interfaces and can reduce a user setting work when connecting to another apparatus.
A plurality of types of input / output interfaces 2a to 2d, an AV decoder 20 for decoding a compression-coded video signal and audio signal, and format conversion of at least one of the decoded video signal and audio signal. When an external device is connected to the format converter 21 and the input / output interface, a connection device authentication unit 23 that authenticates the connection of the external device, and a video and audio format that can be supported by the external device are determined. A video / audio output device comprising: format determination units 26 and 27; and a connection setting selection unit 28 that specifies a format after conversion for the format converter 21 according to the determination results of the format determination units 26 and 27.
[Selection] Figure 2

Description

  The present invention relates to a video / audio output device for transmitting high-definition video and audio based on a standard such as HDMI (High Definition Multimedia Interface), and a video / audio receiving device for receiving the video and audio.

  Conventionally, there has been a DVI (Digital Visual Interface) standard as a standard for transmitting video data as digital data. In this method, pixel data of the primary color signal RGB is digitized in units of pixels, and the video is digitally transmitted in the baseband without being compressed.

On the other hand, in recent years, video / audio signal sources such as digital satellite tuners and video recorders and video display devices / audio reproduction devices such as monitor receivers / AV amplifiers are connected with a single cable, and digital data of the signal source is connected. An HDMI (High Definition Multimedia Interface) standard to be transmitted to a video display device / audio playback device has been standardized. According to this technology, since audio data is compressed and multiplexed and superimposed during the blanking period of the video signal and transmitted simultaneously with the video signal, the audio output terminal is separated from the video output terminal as in the prior art. Or, it is not necessary to connect to an AV amplifier, and it will be widely used in the future. (For example, refer to Patent Document 1).
JP 2002-232377 A (page 2-3, FIG. 1)

  By the way, conventionally, as video / audio transmission technology, video / audio transmission method using MPEG compressed data according to IEEE (The Institute of Electrical and Electronics Engineers) 1394 standard, D video terminal (also called D terminal) is used. (Luminance signal) / Pb (blue color difference signal) / Pr (red color difference signal) component video transmission system, IEC (International Electrotechnical Commission) 60958 standard, optical digital audio transmission system in digital audio format according to IEC61937 standard, etc. All of these transmission systems are widespread.

  Therefore, it is expected that these transmission standards will be mixed in the early days when the HDMI standard begins to spread. For this reason, an AV device equipped with an HDMI terminal must have an AV input / output terminal compatible with the above-mentioned conventional standard for the time being so that it can be connected to a connection device that does not support the HDMI standard. Is desirable.

  However, when AV devices compatible with multiple types of input / output interfaces are connected in this way, the output format of the output side device and the input format of the input side device are considered in consideration of the decoding capability of each device. However, there is a problem that this setting work is very troublesome for the user.

  Therefore, an object of the present invention is to realize an AV device that can support a plurality of types of input / output interfaces, and that can reduce the setting work by the user when connecting to other devices.

  In order to solve the above problems, a video / audio output device according to the present invention includes a plurality of types of input / output interfaces, a decoder for decoding compression-coded video signals and audio signals, a decoded video signal, and A format conversion unit that converts at least one of the audio signals, a connected device authentication unit that authenticates that the external device is connected when the external device is connected to the input / output interface, and a video signal and an audio signal For at least one, a format determination unit that determines a format that can be supported by the external device authenticated by the connected device authentication unit, and specifies a format after conversion to the format conversion unit according to the determination result of the format determination unit And a format conversion control unit.

  The video / audio receiving apparatus according to the present invention also includes a first interface for inputting a compression-coded video signal and audio signal, and a multiplexed signal in which the compressed audio signal is superimposed on an uncompressed video signal. A plurality of types of input / output interfaces including at least a second interface for input, a first decoder for decoding a video signal and an audio signal input from the first interface, and input from the second interface A second decoder that decodes the multiplexed signal, a video / audio output unit that outputs the decoded video signal and audio signal, and an input from the plurality of types of input / output interfaces; When there is an input from the first interface, the output of the first decoder is sent to the video / audio output unit and input from the second interface If there is characterized in that an input switching unit to send the output of the second decoder to the audio-video output unit.

  The video / audio output method according to the present invention includes a connection authentication step for authenticating that an external device is connected when the external device is connected to any of a plurality of types of input / output interfaces, and a video signal and audio. A format determination step for determining a format that can be supported by the external device authenticated in the step for at least one of the signals, a decoding step for decoding the compression-decoded video signal and audio signal, and the format determination step In accordance with the determination result, a format conversion step for performing format conversion on at least one of the video signal and the audio signal decoded in the decoding step, and outputting the format-converted video signal and audio signal to the input / output interface And an output step.

  The video / audio reception method according to the present invention also includes a first interface for inputting a compression-coded video signal and audio signal, and a multiplexed signal in which the compressed audio signal is superimposed on the uncompressed video signal. A step of detecting from any of a plurality of types of input / output interfaces including at least a second interface to be input; and when there is an input from the first interface, the input from the first interface Decoding video signals and audio signals and outputting video and audio signals, and decoding and outputting multiplexed signals input from the second interface when there is an input from the second interface. Features.

  Further, the computer program according to the present invention includes a connection authentication step for authenticating that an external device is connected when the external device is connected to any of a plurality of types of input / output interfaces, and a video signal and an audio signal. For at least one, a format determination step for determining a format that can be supported by the external device authenticated in the step, a decoding step for decoding the compression-decoded video signal and audio signal, and determination of the format determination step A format conversion step for performing format conversion on at least one of the video signal and audio signal decoded in the decoding step according to the result, and an output step for outputting the video signal and audio signal subjected to format conversion to the input / output interface And run on the computer Characterized in that it comprises instructions to cause.

  Furthermore, a computer program according to the present invention inputs a first interface for inputting a compression-coded video signal and audio signal, and a multiplexed signal in which a compressed audio signal is superimposed on an uncompressed video signal. A step of detecting which of a plurality of types of input / output interfaces including at least a second interface is input; and, when there is an input from the first interface, a video signal input from the first interface And a command for causing the computer to decode and output the audio signal and to decode and output the multiplexed signal input from the second interface when there is an input from the second interface. It is characterized by.

  According to the present invention, it is possible to realize an AV device that can support a plurality of types of input / output interfaces and that can reduce user setting work when connecting to other devices.

  According to the video / audio output device having the above configuration, when an external device is connected to any of a plurality of types of input / output interfaces, the external device is authenticated and a format that can be supported by the device is determined. Thus, the format of the video / audio signal to be output is determined. Accordingly, it is possible to provide a video / audio output device that can output video and audio in accordance with the signal processing capability of the connected device and that reduces the time and effort for the user to set the format.

  The video / audio output device further includes a user selection input unit that presents a user with a selectable format based on a determination result of the format determination unit, and receives an input of the selection result. It is preferable that a post-conversion format to be specified for the format conversion unit is determined based on a selection result input by the user to the user selection input unit. According to this configuration, if the user desires, the post-conversion format can be determined according to the user designation.

  In the video / audio output device, when the selection result input by the user to the user selection input unit includes a plurality of formats, the format conversion control unit can convert the input video signal or audio signal. Of these formats, the highest quality format is preferably determined as the post-conversion format. According to this configuration, when the user desires, it is possible to provide the highest quality video and audio while following the user designation. Note that “high quality” means, for example, in the case of a video signal, a higher number of pixels (number of scanning lines) means higher quality, and if the number of scanning lines is the same, progressive scanning is performed rather than interlace scanning. Can be said to be higher quality.

  Further, the video / audio output device converts the video signal and audio signal format-converted by the format conversion unit into a transmission format corresponding to an input / output interface for an external device authenticated by the connection device authentication unit. It is preferable to further include a transmission unit that outputs to the input / output interface.

  Further, in the video / audio output device, the transmission unit may receive an uncompressed video signal and an audio signal, and convert the compressed audio signal to a non-compressed video signal to convert it into a transmission format. preferable. Furthermore, it is preferable that the plurality of types of input / output interfaces include at least an HDMI standard compatible interface and an IEEE1394 standard compatible interface.

  Hereinafter, specific embodiments of the present invention will be described with reference to FIGS.

  In this embodiment, a DVD recorder is shown as a specific example of the video / audio output device, and a monitor receiver compatible with digital high-definition television broadcasting is shown as a specific example of the video / audio reception device, but the video / audio output device and video / audio reception device of the present invention are shown. Is not limited to these specific examples.

  FIG. 1 shows a configuration of an AV system including a video / audio output device (DVD recorder 2) and a video / audio reception device (monitor receiver 1) according to the present embodiment, and a connection form between the devices.

  As shown in FIG. 1, the DVD recorder 2 of this embodiment can be connected to the monitor receiver 1 by an IEEE1394 cable 10a, a D terminal video cable 10b, an analog audio cable 10c, and an HDMI cable 10d. Note that the cables 10a to 10d shown in FIG. 1 are not always connected to each other as shown in the drawing, and depending on the interface standards of each device and the user's purpose, At least one of them is connected. The monitor receiver 1 is connected to a pair of left and right speakers 5 and 6.

  Further, the DVD recorder 2 can be connected to the AV amplifier 3 by an analog audio cable 10c or an HDMI cable 10d. The AV amplifier 3 is connected to a pair of left and right speakers 7 and 8.

  Here, a schematic configuration of the DVD recorder 2 will be described with reference to FIG.

  As shown in FIG. 2, the DVD recorder 2 connects the IEEE1394 terminal 2a for connecting the IEEE1394 cable 10a, the D terminal 2b for connecting the D terminal video cable 10b, and a pair of left and right audio audio cables 10c. A pair of left and right analog terminals 2c for HDMI and an HDMI terminal 2d for connecting the HDMI cable 10d are provided. In FIG. 2, for convenience of explanation, the HDMI terminal 2 d is shown separately on the left side when it functions as an input terminal and on the right side when it functions as an output terminal (that is, a terminal denoted by reference numeral 2 d in FIG. 2). However, in an actual device, it is physically configured as one terminal. However, the number of HDMI terminals and IEEE1394 terminals is not limited to one, and may be plural.

  The DVD recorder 2 further includes an AV decoder 20, a format converter 21, a transmitter 22, a connected device authentication unit 23, a DVD drive 24, a connected device determination unit 25, a video format determination unit 26, an audio format determination unit 27, and a connection setting selection. Unit 28 and a GUI screen display unit 29.

  The DVD drive 24 records / reproduces information with respect to the DVD by an optical pickup or the like (not shown). The DVD drive 24 reads the MPEG audio encoded audio / video signal from the DVD and sends it to the AV decoder 20. The AV decoder 20 decodes the video / audio signal received from the DVD drive 24, and separates and outputs the video / audio signal. The format converter 21 converts the video signal and audio signal output from the AV decoder 20 into a format according to an instruction from the connection setting selection unit 28. The transmitter 22 compresses and encodes the audio signal, superimposes it on the video signal, and converts it into a transmission format in the HDMI format.

  The connected device authentication unit 23 includes an authentication unit 23d for authenticating a device connected to the HDMI terminal 2d and an authentication unit 23a for authenticating a device connected to the IEEE1394 terminal 2a, and the HDMI terminal 2d or the IEEE1394 terminal. Detecting devices connected to 2a and authenticating with the connection destination by means of authentication defined by each transmission protocol, such as HDCP (High-bandwidth Digital Content Protection) or DTCP (Ditgital Transmission Content Protection) authentication, It is determined whether an output signal can be transmitted to the connection destination.

  The connected device determination unit 25 determines the input / output interface of the connected device based on the detection result of the connected device authentication unit 23. The video format determination unit 26 determines a video format that can be supported by the connected device. The audio format determination unit 27 determines an audio format that can be supported by the connected device. The connection setting selection unit 28 determines the video / audio format according to the type of video / audio format that can be supported by the connected device and the user's request, and instructs the format converter 21. The GUI screen display unit 29 receives a user operation input through the GUI.

  FIG. 3 shows an internal schematic configuration of the monitor receiver 1. As shown in FIG. 3, the monitor receiver 1 includes a pair of left and right terminals for connecting an IEEE1394 terminal 1a for connecting an IEEE1394 cable 10a, a D terminal 1b for connecting a D terminal video cable 10b, and an analog audio cable 10c. The analog terminal 1c and the HDMI terminal 1d for connecting the HDMI cable 10d are provided.

  The monitor receiver 1 further includes a receiver 11, an input switching unit 12, a video / audio output unit 13, a CRT (cathode ray tube) 14, a switching control unit 15, a ROM (read only memory) 16, a connected device authentication unit 17, an AV. A decoder 18 is provided. The monitor of the monitor receiver 1 is not limited to the CRT, and may be a liquid crystal display, a plasma display, an organic EL display, or the like.

  The AV decoder 18 decodes the video / audio and audio signal input from the IEEE1394 terminal 1a. The receiver 11 separates and decodes the audio signal and the video signal from the video / audio data input from the HDMI terminal 11d. The input switching unit 12 outputs any of the signals input from the D terminal 1b, the AV decoder 2, and the receiver 11 to the video / audio output unit 13 by switching the internal switch. The video / audio output unit 13 performs processing for displaying the video signal on the CRT 14 among the video signal and audio signal sent from the input switching unit 12 and outputs the audio signal to the speakers 5 and 6. The switching control unit 15 performs switch control of the input switching unit 12 based on information from the connected device authentication unit 17. The ROM 16 stores video / audio decoding capability information of the monitor receiver 1. The decoding capability information is information relating to a video / audio format that can be supported by the monitor receiver 1, and is read from the ROM 16 when a connected device compatible with the HDMI interface is connected to the monitor receiver 1. It is supplied to the connected device via the HDMI terminal 1d. The connected device authentication unit 17 authenticates whether or not a device is connected to the IEEE1394 terminal 1a.

  Hereinafter, the operation of the DVD recorder 2 when the monitor receiver 1 is connected will be described with reference to the flowchart of FIG. Note that the HDMI terminal 2d and the IEEE1394 terminal 2a of the DVD recorder 2 are terminals corresponding to so-called hot plugs (HotPlug) that can be connected and disconnected while the DVD recorder 2 is operating.

  When the HDMI cable 10d or IEEE1394 cable 10a is connected to the HDMI terminal 2d or IEEE1394 terminal 2a, a bus reset occurs (step S1). The connected device authentication unit 23 uses this as a trigger to execute hot plug detection processing (step S2). At this time, for example, when the HDMI cable 10d is connected to the HDMI connection terminal 2d, the authentication unit 23d detects this and performs a device authentication operation. For example, when both the HDMI cable 10d and the IEEE1394 cable 10a are connected, further bus reset occurs, and the hot plug detection process and device authentication are performed twice in total.

  Next, the connected device determination unit 25 determines whether the detection factor in step S2 is the HDMI interface or the IEEE1394 interface (step S3).

  If the determination result in step S3 is HDMI, the video format determination unit 26 acquires video format information that can be decoded by the connected monitor receiver 1 (step S4). In addition, the audio format determination unit 27 acquires the audio decode format information of the connected monitor receiver 1 (step S5). Note that the format information in steps S4 and S5 is acquired from the decoding capability information supplied from the ROM 16 of the monitor receiver 1 to the DVD recorder 2 via the HDMI cable 10d as described above.

  If the AV amplifier 3 is not connected, the process branches at step S6 and the video format check at step S7 and the audio format check at step S8 are performed by the video format determination unit 26 and the audio format determination unit 27. Each done.

  On the other hand, when the AV amplifier 3 is also connected in addition to the monitor receiver 1, the video and audio information of the AV amplifier 3 and the monitor receiver 1 can be seen from the DVD recorder 2 in an integrated form. Therefore, the video and audio information of the AV amplifier and the monitor receiver are read from the ROM 16 described above. Of the information obtained in steps S4 and S5, the information item related to the AV amplifier 3 branches from step S6 to step S8, and the video format check in step S7 is not executed. The item of information related to the monitor receiver 1 branches from step S6 to step S7. The connection setting selection unit 28 collates the decoding capability information acquired by the video format determination unit 26 and the audio format determination unit 27 with the format that can be output from the DVD recorder 2 (steps S7 and S8). A list of formats that can be output from the DVD recorder 2 is stored, for example, in an output format information storage unit 28a (see FIG. 2) in the connection setting selection unit 28.

  Further, the connection setting selection unit 28 converts the format that can be output from the DVD recorder 2 and that can be decoded and output by the monitor receiver 1 on the GUI screen based on the result of collation in steps S7 and S8. This is presented on the user selection screen of the display unit 29 (step S9).

  FIG. 6 shows a display example when the formats that can be output from the DVD recorder 2 are 480p, 720p, and 1080i, and the video format that can be decoded and output by the monitor receiver 1 is only 1080i or 480p. In addition, in the notations such as “1080i” and “480p”, the number indicates the number of scanning lines, “i” indicates interlaced scanning, and “p” indicates progressive scanning.

  In the example of FIG. 6, among the formats that can be output from the DVD recorder 2, the formats that can be decoded and output by the monitor receiver 1 are highlighted (indicated by shading in FIG. 6). Then, the user can select one of the highlighted items (step S10). The result selected by the user is sent from the connection setting selection unit 28 to the format converter 21 (step S11).

  That is, in the example shown in FIG. 6, the 720p video cannot be selected, and can be selected from “Auto”, “1080i”, or “480p”. The audio format that can be decoded by the monitor receiver 1 is AAC or LPCM, and AC3 cannot be selected. In the present embodiment, when the user selects “Auto”, the input video signal is converted into one of selectable formats (adaptive conversion) according to the format. On the other hand, when the user selects a specific format other than “Auto”, the input video signal is converted (fixed conversion) into the format selected by the user regardless of the input format.

  For example, in the example of FIG. 6, when the user selects “Auto” and the format of the input video is 720p, the format converter 21 converts the format of the 720p input video to 1080i and outputs it. This is because a 720p video can be converted into both 1080i and 480p, but 1080i has higher quality. When a 480p or 1080i video is input, the format converter 21 outputs the video as it is without converting the format.

  On the other hand, when the user selects, for example, “1080i” on the user selection screen, a command “fixed to 1080i” is output from the connection setting selection unit 28 to the format converter 21. In this case, the format converter 21 converts the input video format into any 1080i video format and outputs it. When “480p” is selected, a command “fixed to 480p” is output from the connection setting selection unit 28 to the format converter 21. The format converter 21 converts any input video format into a 480p video format and outputs it.

  In the present embodiment, the user can also select an input interface on the user selection screen. In this case, the process branches from step S10 to the process shown in the flowchart of FIG. For example, if the user selects “D terminal” input on the user selection screen, an Auto / D2 / D3 / D4 video output setting menu is displayed as shown in FIG. 7 (step S20). The user can make further selections within this setting menu (step S21). Here, when the user selects “D4”, the type of the D terminal is determined to be “D4” (step S22), and the connection setting selection unit 28 changes the format converter 21 to “D4”, that is, 480i / 480p. / 1080i video format command is output (step S23). Again, the format of the 720p video is converted into a 1080i video and output from the format converter 21.

  The video signal and the audio signal output from the format converter 21 are input to the transmitter 22 when the user selects the HDMI interface. The transmitter 22 performs time division processing on the component video signal (Y / Pb / Pr), multiplexes the compressed audio signal during the blanking period of the video signal, and outputs the multiplexed audio signal to the monitor receiver 1 from the HDMI terminal 1d.

  On the other hand, when the user selects the D terminal interface as described above, the video signal and the audio signal output from the format converter 21 are output to the D terminal 1b without going through the transmitter 22.

  When the user selects the IEEE1394 interface, the mode is forcibly set to the IEEE1394 mode, and thus no signal is output from the HDMI terminal 1d. In this case, the signal reproduced from the DVD drive 24 is input to the AV decoder, but video and audio are not decoded from the MPEG compressed data, and the MPEG transport stream is formatted according to the transmission protocol of the IEEE1394 interface. And output from the IEEE1394 terminal 2a.

  In the flowchart of FIG. 4, if the determination result in step S3 is other than HDMI, device connection information is acquired from the IEEE1394 terminal 2a (step S12).

  Since the device authentication has already been completed at the end stage of step S2, the DVD recorder 2 is in a state where information can be freely exchanged with the monitor receiver 1. The DVD recorder 2 issues a device information acquisition command to the monitor receiver 1. The monitor receiver 1 notifies the DVD recorder 2 that the monitor receiver 1 is a monitor that receives a video signal.

  As described above, it is possible to provide a DVD recorder that supports both the IEEE1394 terminal and the HDMI connection terminal by combining adaptive format conversion processing and user selection processing.

  Next, processing on the monitor receiver 1 side will be described.

  When the DVD recorder 2 is connected to the HDMI terminal 1d, video / audio data is input to the receiver 11. The receiver 11 separates the video data and the audio data from the multiplexed video / audio data, and then performs decoding. Furthermore, the receiver 11 notifies the switching control unit 15 that HDMI video / audio has been input. The switching control unit 15 switches the switch of the input switching unit 12 to the HDMI side. As a result, the output of the receiver 11 is supplied to the video / audio output unit 13.

  The video / audio output unit 13 performs video output processing such as DA conversion and RGB amplification on the video data, and draws it on the CRT 14. Also, the video / audio output unit 13 DA-converts the audio data and outputs it to the speakers 5 and 6.

On the other hand, when the DVD recorder 2 is connected to the IEEE1394 terminal 1a, the connected device authentication unit 17 authenticates the connected device (DVD recorder 2). Upon receiving the notification from the connected device authentication unit 17, the switching control unit 15 switches the switch of the input switching unit 12 to the IEEE1394 terminal 1a side. That is, the MPEG-compressed video / audio data is separated into video data and audio data by the AV decoder 18 and decoded, and then supplied to the video / audio output unit 13.
Further, when neither video data nor audio data is supplied to the HDMI terminal 1d and the IEEE1394 terminal 1a, no control command is input to the switching control unit 15. At this time, the input to the D terminal 1b becomes valid, and the video signal input to the D terminal 1b and the audio signal input to the analog audio terminal 1c are selected.

  As described above, in a monitor receiver having a plurality of types of input / output interfaces, even when transmission formats from external devices are different, the transmission formats can be automatically determined and appropriately monitored. Further, by operating only the necessary decoder (receiver) according to the transmission format from the external device, standby power in the monitor receiver can be reduced.

  It should be noted that the present invention can also be implemented as a program including instructions for causing a computer to execute the processing shown in the flowchart of FIG. In this case, the object of the present invention can be achieved by reading this program into the memory of a DVD recorder or monitor receiver and causing the microcomputer to execute it.

In the above embodiment, the DVD recorder is exemplified as the video / audio output device, and the monitor receiver is exemplified as the video / audio reception device. However, the present invention is not limited to these specific examples and can be applied to any AV apparatus. is there.
Furthermore, in the above-described embodiment, the configuration in which AV data reproduced by a video / audio output device (for example, a DVD recorder) is sent to a monitor receiver is exemplified. However, when an IEEE1394 cable or an HDMI cable is used, a plurality of AV devices are connected. Since tree connection or daisy chain connection is also possible, the AV data output from the video / audio output device to the video / audio reception device may be AV data transmitted from another video / audio output device.

  As described above, the present invention is an AV device that can support a plurality of types of input / output interfaces, and is useful as a device that can reduce user setting work when connecting to other devices.

It is a block diagram which shows the connection form of the video / audio output device and video / audio reception device concerning one Embodiment of this invention. It is a block diagram which shows the internal schematic structure of the video / audio output device concerning one Embodiment of this invention. It is a block diagram which shows the internal schematic structure of the video / audio receiver concerning one Embodiment of this invention. It is a flowchart which shows operation | movement of the video / audio output device concerning one Embodiment of this invention. It is a flowchart which shows operation | movement of the video / audio output device concerning one Embodiment of this invention. It is explanatory drawing which shows the example of a display of the GUI screen of the video / audio output device concerning one Embodiment of this invention. It is explanatory drawing which shows the example of a display of the GUI screen of the video / audio output device concerning one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Monitor receiver 2 DVD recorder 3 AV amplifier 5-8 Speaker 10a IEEE1394 cable 10b D terminal video cable 10c Analog audio cable 10d HDMI cable 11 Receiver 12 Input switching part 13 Video audio output part 14 CRT
15 Switching control unit 16 ROM
17 connected device authentication unit 18 AV decoder 20 AV decoder 21 format converter 22 transmitter 23 connected device authentication unit 24 DVD drive 25 connected device determination unit 26 video format determination unit 27 audio format determination unit 28 connection setting selection unit 29 GUI screen display unit

Claims (12)

Multiple types of input / output interfaces,
A decoder for decoding the compression-coded video signal and audio signal;
A format converter for converting the format of at least one of the decoded video signal and audio signal;
When an external device is connected to the input / output interface, a connected device authentication unit that authenticates that the external device is connected;
A format determination unit that determines a format that can be supported by the external device authenticated by the connected device authentication unit for at least one of a video signal and an audio signal;
A video / audio output device comprising: a format conversion control unit that designates a format after conversion for the format conversion unit according to a determination result of the format determination unit. Presenting the user with a selectable format based on the determination result of the format determination unit, further comprising a user selection input unit that accepts input of the selection result,
The video / audio output device according to claim 1, wherein the format conversion control unit determines a post-conversion format to be specified to the format conversion unit based on a selection result input by a user to the user selection input unit. When the selection result input by the user to the user selection input unit includes a plurality of formats, the format conversion control unit is the highest quality format among the formats that can be converted from the input video signal or audio signal. The video / audio output apparatus according to claim 1, wherein the format is determined as the post-conversion format. A transmission unit that converts the video signal and audio signal format-converted by the format conversion unit into a transmission format corresponding to the input / output interface for the external device authenticated by the connected device authentication unit, and outputs the transmission format to the input / output interface; The video / audio output device according to claim 1, further comprising: 5. The video / audio output device according to claim 4, wherein the transmission unit receives an uncompressed video signal and an audio signal, and converts the compressed audio signal into a non-compressed video signal to be converted into a transmission format. . 6. The video / audio output device according to claim 5, wherein the plurality of types of input / output interfaces include at least an HDMI standard compatible interface and an IEEE1394 standard compatible interface. A plurality of types including at least a first interface for inputting a compression-coded video signal and audio signal and a second interface for inputting a multiplexed signal in which a compressed audio signal is superimposed on an uncompressed video signal I / O interface
A first decoder for decoding a video signal and an audio signal input from the first interface;
A second decoder for decoding the multiplexed signal input from the second interface;
A video / audio output unit for outputting the decoded video signal and audio signal;
It is detected from any of the plurality of types of input / output interfaces, and when there is an input from the first interface, the output of the first decoder is sent to the video / audio output unit and input from the second interface And an input switching unit that sends the output of the second decoder to the video / audio output unit. The video / audio receiver according to claim 7, wherein the first interface is an IEEE1394 standard compatible interface, and the second interface is an HDMI standard compatible interface. A connection authentication step for authenticating that the external device is connected when the external device is connected to any of the multiple types of input / output interfaces;
A format determination step for determining a format that can be supported by the external device authenticated in the step for at least one of a video signal and an audio signal;
A decoding step of decoding the compressed and decoded video signal and audio signal;
A format conversion step for performing format conversion on at least one of the video signal and the audio signal decoded in the decoding step according to the determination result of the format determination step;
A video / audio output method including an output step of outputting the format-converted video signal and audio signal to the input / output interface. A plurality of types including at least a first interface for inputting a compression-coded video signal and audio signal and a second interface for inputting a multiplexed signal in which a compressed audio signal is superimposed on an uncompressed video signal Detecting from which input / output interface the input is,
When there is an input from the first interface, the video signal and the audio signal input from the first interface are decoded and output. When there is an input from the second interface, from the second interface And a method of decoding the input multiplexed signal and outputting the decoded signal. A connection authentication step for authenticating that the external device is connected when the external device is connected to any of the multiple types of input / output interfaces;
A format determination step for determining a format that can be supported by the external device authenticated in the step for at least one of a video signal and an audio signal;
A decoding step of decoding the compressed and decoded video signal and audio signal;
A format conversion step for performing format conversion on at least one of the video signal and the audio signal decoded in the decoding step according to the determination result of the format determination step;
A computer program comprising instructions for causing a computer to execute an output step of outputting a format-converted video signal and audio signal to the input / output interface. A plurality of types including at least a first interface for inputting a compression-coded video signal and audio signal and a second interface for inputting a multiplexed signal in which a compressed audio signal is superimposed on an uncompressed video signal Detecting from which input / output interface the input is,
When there is an input from the first interface, the video signal and the audio signal input from the first interface are decoded and output. When there is an input from the second interface, from the second interface A computer program comprising instructions for causing a computer to execute a step of decoding and outputting an input multiplexed signal.

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