JP2005078678A - Data processor and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To process the contents data of various data forms, and to efficiently reproduce such a plurality of contents data simultaneously in parallel. <P>SOLUTION: This processor is provided with an encoder 11d for encoding contents data output from a recording medium reproducing device 30 or a HDD 11a, a decoder 11f for decoding the output contents data or the contents data encoded by the encoder 11d, and a processor 11c for processing the output contents data by controlling the encoder 11d and the decoder 11f. The processor 11c outputs the processed contents data to a client 20. The other contents data is output through an output port to a client device while the contents data of the recording medium reproducing device 30 or the HDD 11a is processed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a data processing apparatus and program for processing content data.

  Recently, content data in various data formats representing images (hereinafter, including still images and videos (moving images)) and sound have been distributed in various forms.

  For example, the data format of content data representing an image includes MPEG1 (Moving Picture Experts Group 1; DVD video data (moving image) compression format), MPEG2, JPEG (Joint Photographic Experts Group; still image compression format). ), MPEG4 (compression format with higher compression ratio than MPEG2), etc., and the data format of content data representing audio is PCM (Pluse Code Modulation), AC3 (Audio Code Number 3) (registered trademark), MP3 ( MPEG1 audio layer 3) and WMA (Windows Media (registered trademark) Audio).

  Further, examples of the distribution form of content data include a recording medium and a communication distribution form. Such a recording medium is a CD (Compact Disc), a DVD (Digital Versatile Disc), an HDD, a memory medium (for example, a Memory Stick (registered trademark), an SD card, a multimedia card) or the like. Internet protocol such as USB (Universal Serial Bus), TCP / IP (Transmission Control Protocol / Internet Protocol), IEEE802.11b (wireless LAN protocol) via a wired transmission medium such as a wireless LAN or the like. Some of them are performed based on the transmission format.

Various playback devices for playing back content data according to such various data formats have also been devised (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-145780

However, the above conventional technique has the following problems.
Content data in various data formats must be reproduced by dedicated reproduction devices according to the data formats. For this reason, the user needs to purchase a reproducing apparatus according to the data format of the desired content data.

  Further, the user needs to select a playback device owned by the user according to the data format of the desired content data, and to give a playback instruction to each playback device, which complicates the playback operation.

  Furthermore, even in the home, two or more people may try to play different content data at the same time due to different hobbies and preferences of each person. It is necessary to prepare a playback device in each room.

  An object of the present invention is to process content data of various data formats in a data processing apparatus and program for processing content data representing images and sounds, and efficiently and concurrently process a plurality of such content data. To be able to play it.

In order to solve the above-mentioned problem, the invention described in claim 1
A receiving unit for receiving content data output from a plurality of content data supply means;
An encoder for encoding content data received via the receiving unit;
A decoder for decoding content data received via the receiving unit;
An output unit for requesting transmission of content data received from the content data supply unit by designating content data stored in the plurality of content data supply units, and outputting the content data to a receivable client device;
With
While receiving the first content data from one content data supply unit, the second content data of another content data supply unit is output to the output unit.

Moreover, in order to solve the said subject, invention of Claim 2 is the following.
A first receiver for receiving content data output from the first content data supply means;
A second receiver for receiving content data output from the second content data supply means;
An encoder that encodes content data received via the first receiver and / or the second receiver;
A decoder for decrypting content data received via the first receiver or the second receiver;
Processing means for controlling the encoder and the decoder;
The content data received from the first content data supply means and / or the second content data supply means is received by designating the contents of the first content data supply means or the second content data supply means. An output unit that outputs to a possible client device;
With
The second content of the first content data supply means or the second content data supply means while receiving the first content data of the first content data supply means or the second content data supply means. The data is output to the output unit.

Moreover, in order to solve the said subject, invention of Claim 7 is the following.
On the computer,
A receiving unit that receives one or a plurality of content data, an encoder that encodes the content data received by the receiving unit, a decoder that decodes the content data received by the receiving unit, and the received A function of outputting content data to the client device is realized, and a function of outputting other content data to the output unit while receiving one content data is realized.

  Therefore, in a data processing apparatus and program for processing content data, content data in various data formats can be processed, and a plurality of such content data can be efficiently and concurrently reproduced.

The signal processing system 100 will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 5, the signal processing system 100 includes a data processing device 10, a client 20, a recording medium playback device 30 as a first content data supply unit, receivers 40 a and 40 b, an RS232C expansion PC 50, a remote controller. Conversion BOX 51a, 51b, monitor 52a, 52b, HUB53, 5.1ch speaker system connected to the receiver 40a, stereo speakers L, R connected to the receiver 40b, and the like are configured.
In FIG. 1 to FIG. 17, the data processing apparatus 10 is described using the name “MMS” for simplification.

  The data processing apparatus 10 performs data processing (including reproduction processing) of various content data, and simultaneously performs data processing on a plurality of content data.

  The data processing apparatus 10 includes a motherboard 11 with receiving ports 11b and 11e as first and second receiving units, a processor 11c as processing means, an encoder 11d, a decoder 11f, and the like. In addition, an HDD 11 a as a second content data supply unit is provided in the same housing as the data processing apparatus 10.

  The motherboard 11 can drive Linux, which is an OS (Operating System) used for the processor 11c, such as X86 (registered trademark), Motorola 68k (registered trademark), Digital Alpha (registered trademark), SPARC (registered trademark), etc. Based on computer architecture.

  The HDD 11a is compressed in a compression format such as digital still image data (JPEG format), digital video data (moving images in a data format such as MPEG2, MPEG4, H.264, etc.), digital compressed audio data (MP3, WMA, etc.). Hereinafter, each piece of data of digital audio data) is stored.

  Hereinafter, digital (or analog) still image data and digital (or analog) video data are collectively referred to as digital (or analog) image data, and further, digital (or analog) image data and digital (or analog) audio data are Sometimes simply referred to as digital (or analog) data. The content data means digital (or analog) image data or digital (or analog) audio data.

  The HDD 11a outputs each of the above data in response to a playback instruction from the processor 11c, and is configured so as to be capable of high-speed playback sufficiently faster than the speed corresponding to analog output playback of images and sounds. Accordingly, since the processor 11c can access the plurality of memory areas of the HDD 11a in a time-sharing manner, a plurality of content data can be reproduced simultaneously in parallel.

  The HDD 11a stores a program for the processor 11c to perform the processes shown in the flowcharts of FIGS.

  The HDD 11a can also be used as a buffering memory when the encoder 11d performs an encoding process.

  Various data output from the HDD 11a is input to the processor 11c via the reception port 11b.

  The processor 11c controls at least the encoder 11d and the decoder 11f, and in the present embodiment, the entire data processing apparatus 10 is controlled in an integrated manner. Of course, the overall control of the data processing apparatus 10 may be performed by another processor. In this case, a plurality of processors may be integrated to form one control unit. The processor 11c controls the HDD 11a, the reception ports 11b and 11e, the encoder 11d, and the decoder 11f by executing programs for performing the processes shown in the flowcharts of FIGS. Perform data processing. This program is stored in a built-in memory (not shown), but may be stored in the HDD 11a.

  The processor 11c performs software decoding processing using a program on JPEG digital image data.

  The processor 11c causes the decoder 11f to decode the digital data output from the HDD 11a other than the digital image data in JPEG format as necessary. For this reason, when digital data other than the JPEG format is input, a process of passing through the digital data (that is, a process of simply passing the digital data) is performed.

  When analog format image data and audio data are input from the recording medium playback device 30, the processor 11c does not perform decoding processing, encoding processing, or the like. In this case, the processor 11c may pass the input data from the recording medium playback device 30 once through the processor 11c (that is, through processing), or control of the encoder 11d and decoder 11f. The input data from the recording medium playback device 30 may be directly input to the encoder 11d. Once passing through the processor 11c, the processor 11c can perform encoding and decoding processes while directly grasping the data state, so that efficient control is possible.

  The processor 11c uses GUI (Graphical User Interface) to switch content data to be played back (including switching of content data supply sources such as the HDD 11a, the recording medium playback device 30, and the portable recording medium 60). I do. For example, the processor 11c displays a menu screen shown as an example in FIG. 6 on the monitors 52a and 52b by using an OSD (on-screen display) function. In this case, three recording medium playback devices 30 are connected to the data processing device 10 and are displayed as device 1, device 2, and device 3, respectively. After displaying the menu screen, the user designates content data displayed on the menu screen using a pointing device such as a mouse or a touch panel, or a keyboard. In response to this designation input, the processor 11c displays a more detailed content data menu screen and waits for the user's selection input. The switching process can be executed regardless of whether the content data is currently being reproduced. That is, when the menu screen as shown in FIG. 6 is displayed in the state where the content data is being reproduced, the menu screen is displayed so as to overlap the currently displayed screen using the OSD function. Further, the screen currently being displayed may be divided and a menu screen may be displayed on one side.

  In addition, it is assumed that the OS used for the processor 11c is, for example, Linux. Linux supports multitask processing, which is advantageous when reproducing a plurality of content data in parallel. The OS is not limited to Linux as long as it can support multitask processing.

  The encoder 11d encodes analog image data into MPEG4 format compressed image data, or simply digitizes the analog image data. Such mere digitization is performed so that the processing inside the data processing apparatus can be performed using digital data, and in particular, the digitization is performed to enable the OSD function described above. The The encoding process with conversion to MPEG4 is for reducing the data transmission load to the client 20 by reducing the amount of data.

  The encoder 11d also performs digitization processing on analog audio data in order to facilitate internal processing, as in the case of analog image data described above.

  When the digital audio data input for transmission to the client 20 is 3ch or more, the encoder 11d performs downmix / digital conversion processing on the digital audio data to 2ch as necessary. When transmitting data to the client 20, the encoder 11d converts the received data according to the TCP / IP protocol for each predetermined length data, and sequentially outputs the data as streaming data.

  The decoder 11f performs decoding processing on the input digital data as necessary to convert it into an analog format, and outputs it to the receiver 40a and the monitor 52a. Analog image data output from the decoder 11f is supplied to the monitor 52b, and analog audio data is supplied to the receiver 40a.

  For example, the decoder 11f performs a decoding process according to the data format of the digital image data (other than the JPEG format image reproduction) of the HDD 11a, and outputs it to the monitor 52a as analog image data. Similarly, in the case of digital audio data in the HDD 11a, decoding processing corresponding to the data format is executed and output to the receiver 40a as analog audio data.

  Note that digital image data and digital audio data from the recording medium playback device 30 (data input to the decoder 11f is digitized by the encoder 11d in the previous stage) are not compressed and formatted. On the other hand, the decoder 11f performs only D / A (Digital / Analog) conversion as necessary and outputs the result to the receiver 40a and the monitor 52a.

  When a reproduction instruction is input from the client 20, digital image data and digital audio data are output to the client 20 via a LAN (Local Area Network) such as Ethernet (registered trademark), for example. The LAN used here may be either wired or wireless. In the case of wireless, for example, IEEE802.11b can be used. This IEEE802.11b has the performance of transmitting MPEG4 format digital image data and analog audio data in a streaming format.

  When the digital audio data and digital video data in the HDD 11a are output to the client 20, the client 20 performs a decoding process on the digital audio data and the digital video data, so that the decoder 11f performs a through process. 11c.

  The client 20 includes a mother board 21, an HDD 22, and the like. The client 20 uses Ethernet (registered trademark), a wireless LAN, or the like for data transmission / reception with the data processing apparatus 10.

  The motherboard 21 is based on the same computer architecture used for the processor 11c, which can drive Linux, which is an OS used for a processor (not shown) mounted on the motherboard 21.

  The client 20 performs software decoding processing on the input digital image data and digital audio data by a processor (not shown) mounted on the mother board 21 using a program.

  The processor mounted on the mother board 21 decodes the digital audio data of the HDD 11a input in the compressed format, converts the decoded digital audio data into analog, and outputs the analog audio data to the receiver 40b.

  The processor mounted on the mother board 21 receives the digital image data and the digital audio data (transmitted by TCP / IP (Transmission Control Protocol / Internet Protocol)) of the recording medium playback device 30 input from the data processing device 10. On the other hand, after decoding for TCP / IP, it is converted to analog and output to the monitor 52b. Further, the input digital image data and digital audio data may be stored in the HDD 22. The HDD 22 can also be used as a buffering memory for various data processing performed by the processor mounted on the mother board 21, for example, decoding processing.

  Here, since the digital image data of the recording medium playback apparatus 30 is received in the MPEG4 bit stream format, in this case, decoding processing in accordance with the MPEG4 standard is performed.

  Although the analog audio data output from the client 20 is 2ch output, it may be 3ch or more depending on the compression rate and transfer rate. In this case, the downmix processing in the encoder 11d is also supported. Done.

  Note that the mother board 21 may include a decoder similar to the decoder 11f, and the decoder may perform the decoding process in hardware.

  In addition, the client 20 transmits a request signal to the data processing apparatus 10 and receives a status signal indicating an operation state of the data processing apparatus 10 as necessary.

  Further, the client 20 receives a remote control signal transmitted from a remote control device (not shown) through a communication medium such as RS232C via the remote control conversion BOX 51b separately from the bit stream format. The remote control signal received by the client 20 is transmitted to the data processing apparatus 10 via the above-described Ethernet (registered trademark) as necessary, and the processor 11c that receives the remote control signal performs an operation based on the received remote control signal. . The remote control signal transmitted from the client 20 to the data processing apparatus 10 is, for example, an instruction for reproducing a predetermined recording medium to the recording medium reproducing apparatus 30, or an instruction for reproducing predetermined contents to the HDD 11a.

  The recording medium playback device 30 is a so-called megachanger type disc changer that can accommodate a large number of DVDs. For example, the recording medium playback device 30 is formed with slots arranged in a radial shape (doughnut shape) for standing and holding DVDs one by one, and playback means (not shown) at the center thereof. Is arranged. A playback control unit (not shown) of the recording medium playback device 30 loads a disk instructed to be played, transports it to the playback means, chucks it, drives the disk to rotate, and picks up and lasers (both are both) The information recorded on the disc is read by controlling (not shown).

  On the DVD, digital image data is recorded in the MPEG2 format, and digital audio data is recorded in the Dolby Digital (registered trademark) format (AC3 format) as a standard. The recording medium playback device 30 includes a decoder (not shown) therein, and converts the read digital image data and digital audio data into analog. In this case, the digital audio data is converted into 6ch (that is, 5.1ch) output. The analog image signal and analog audio signal thus obtained are output from the recording medium playback device 30 to the data processing device 10.

  Note that the recording medium playback device 30 may output the read digital audio data to the receiver 40a as it is without making it analog, and in this case, analog conversion from 2ch to 6ch is performed on the receiver 40a side.

  The receiver 40a has a function of amplifying and outputting the received analog audio data. The receiver 40a receives and amplifies analog audio data from the data processing apparatus 10, and 5.1ch speaker system (front left and right (L, R), center (C), rear left and right (LS, LR), subwoofer (SW) ) Of a total of six speakers.

  The receiver 40a incorporates a Dolby digital decoder and can receive Dolby digital data in a digital format. In this case, the digital audio data read without being analogized by the recording medium playback device 30 is directly output to the receiver 40a without passing through the data processing device 10. In the present embodiment, the receiver 40a gives priority to digital data input when there is input, but may be configured to be able to select digital input or analog input.

  The RS232C expansion PC 50 includes output ports (not shown) for the recording medium playback device 30 and the receiver 40a. The RS232C expansion PC 50 converts the input remote control signal for RS232C and outputs it to the transmission destination of the remote control signal. .

  The remote control conversion BOX 51a, 51b includes a remote control signal receiving unit transmitted from a remote control device (not shown), converts the key code of the received remote control signal in accordance with the protocol for RS232C, and converts the converted key code to RS232C. To the data processing apparatus 10 and the client 20, respectively.

  In particular, the remote control conversion BOX 51a can receive remote control signals for the data processing device 10, the recording medium playback device 30, and the receiver 40a. The data processing device 10 converts the key code of the received remote control signal for RS232C, and then imports it into the mother board 11 via RS232C for analysis processing. When the remote control signal is a signal related to the processing of the data processing device 10, the data processing device 10 performs processing according to an instruction by the signal, and when the remote control signal is a signal related to the processing of the recording medium playback device 30 or the receiver 40a, The remote control signal is converted to Ethernet (registered trademark), and the converted remote control signal is output from the output port 12 to the RS232C expansion PC 50 through the HUB 53 via the Ethernet (registered trademark).

  As shown in FIG. 5, the signal processing system 100 may be configured such that the portable recording medium 60 is detachably connected to the data processing apparatus 10. The portable recording medium 60 is a mobile HDD device that can record digital data in various data formats.

  This portable recording medium 60 can be connected to, for example, an in-vehicle audio system, so that digital audio data recorded in the portable recording medium 60 can be reproduced in the car.

  The portable recording medium 60 is connected to the data processing apparatus 10 via the USB, and transfers digital data of the portable recording medium 60 to the HDD 11 a of the data processing apparatus 10 or transfers digital data of the HDD 11 a to the portable recording medium 60. It is possible to transfer. In this case, the encoder 11d, the decoder 11f, etc. in the data processing apparatus 10 are not used at all, and the processor 11c only manages the data transfer with the portable recording medium 60.

Next, the operation of the signal processing system 100 will be described with reference to the flowcharts of FIGS. 1 to 5 and FIGS. 7 to 15.
The processing described below is performed by the processor 11c controlling the HDD 11a, the reception ports 11b and 11e, the encoder 11d, the decoder 11f, and the output port 12 based on the program.

  First, a case where the data processing apparatus 10 reproduces digital still image data in the HDD 11a will be described based on FIG. 1 and a flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  The digital still image data (JPEG format) selected according to the input reproduction instruction is output from the HDD 11a to the processor 11c (step S1), and the output JPEG format digital still image data is decoded using a program. (Step S2) The decoded digital still image data is through-processed by the encoder 11d (Step S3), and the digital image data that has been through-processed is D / A converted by the decoder 11f to be analogized (Step S4). The analog still image data is output to the monitor 52a (step S5).

  Next, a case where the data processing apparatus 10 reproduces digital audio data in the HDD 11a will be described based on FIG. 1 and a flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  The digital audio data selected according to the input reproduction instruction is output from the HDD 11a to the processor 11c in the compressed format (MP3, WMA, etc.) (step S6), and the output digital audio data is output from the processor 11c and the encoder. In 11d, through processing is performed (steps S7 and S8), the compressed format data of the digital audio subjected to the through processing is decoded and analogized by the decoder 11f (step S9), and the decoded analog audio data is received by the receiver 40a. Is output (step S10).

  Next, a case where the data processing apparatus 10 reproduces digital video data in the HDD 11a will be described based on FIG. 1 and a flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  The digital video data selected according to the input playback instruction is output from the HDD 11a to the processor 11c in the compressed format (MPEG2, MPEG4, etc.) (step S11), and the output digital video data is output from the processor 11c and the encoder. In 11d, through processing is performed (steps S12 and S13), the compressed format data of the digital video data subjected to the through processing is decoded and analogized by the decoder 11f (step S14), and among the decoded analog video data, Data representing the image is output to the monitor 52a, and data representing the sound is output to the receiver 40a (step S15).

  Next, a case where the data processing apparatus 10 reproduces the DVD of the recording medium reproducing apparatus 30 will be described based on FIG. 2 and the flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  When analog image data and analog audio data of a DVD are input from the recording medium playback device 30 to the encoder 11d, the input data is processed in the PCI (Peripheral Component Ineterconnect) format, so that the analog image data and analog audio data are It is digitized and output to the decoder 11f (step S16), and the output digital image data and digital audio data are subjected to OSD processing if necessary and then analogized (step S17). The data is output to the monitor 52a, and the analog audio data is output to the receiver 40a (step S18).

  Next, a case where the client 20 reproduces the digital still image data in the HDD 11a will be described based on FIG. 3 and the flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  The digital still image data (JPEG format) selected according to the playback instruction input from the client 20 is output from the HDD 11a to the processor 11c (step S19), and the output JPEG format digital still image data uses a program. The decoded digital still image data is through-processed by the encoder 11d and the decoder 11f (steps S21 and S22), and the through-processed digital still image data is output to the client 20 (step S20). Step S23). The client 20 converts the decoded digital still image data received from the data processing device 10 via Ethernet (registered trademark) into an analog image signal, and outputs it to the monitor 52b to display the still image.

  Next, a case where the client 20 reproduces digital audio data in the HDD 11a will be described based on FIG. 3 and a flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  The digital audio data selected according to the reproduction instruction input from the client 20 is output from the HDD 11a to the processor 11c in the compressed format (MP3, WMA, etc.) (step S24), and the output digital audio data is processed by the processor. 11c is through-processed (step 25), the encoder 11d is converted to TCP / IP protocol data and output as compressed audio bitstream data (step 26), the decoder 11f is through-processed (S27), and the compressed audio format The digital audio data is output to the client 20 as the bit stream data (step S28). The client 20 sequentially performs software decoding while outputting compressed audio data received from the data processing device 10 via Ethernet (registered trademark) to a memory or the like (not shown), and outputs an analog audio signal. And output from the speakers (L, R) via the receiver 40b.

  Next, a case where the client 20 reproduces digital video data in the HDD 11a will be described based on FIG. 3 and a flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  The digital video data selected according to the playback instruction input from the client 20 is output from the HDD 11a to the processor 11c in the compressed format (MPEG2, MPEG4, etc.) (step S29), and the output digital video data is processed by the processor. The digital video data that has been through-processed in 11c (step S30) is converted into a data format according to TCP / IP for each predetermined length of data by the encoder 11d and also converted into an MPEG4 bit stream. (Step S31) The converted digital video data is subjected to through processing in the decoder 11f (Step S32), and the digital video data subjected to the through processing is output to the client 20 (Step S33). The client 20 sequentially performs software decoding while buffering the MPEG4 bit stream data received from the data processing apparatus 10 in a memory or the like (not shown) to output an analog image signal and an analog audio signal, and a monitor 52b. And output from the speakers (L, R) via the receiver 40b.

  Next, a case where the client 20 plays back the DVD of the recording medium playback device 30 will be described based on FIG. 4 and the flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  When the remote control signal is given to the remote control conversion BOX and the client 20 that has received the remote control signal from the remote control conversion BOX 51b determines that the remote control signal is an instruction to play a predetermined disc of the recording medium playback device 30, the client 20 Is transmitted to the data processing apparatus 10 via Ethernet (registered trademark). Based on the instruction from the client 20, the data processing apparatus 10 instructs the recording medium reproducing apparatus 30 to reproduce a predetermined disc, and the analog image data and analog audio data of the DVD are input from the recording medium reproducing apparatus 30 to the encoder 11d. The encoder 11d converts the analog image data into MPEG4 format bit stream data and downmix digitally converts the analog audio data into 2ch digital data (step S34). The digital audio data is through-processed in the decoder 11f (step S35), and the through-processed digital image data (MPEG4) and digital audio data (2ch) are output to the client 20 (step S36). The client 20 sequentially performs software decoding while buffering the received MPEG4 bit stream data in a memory or the like (not shown) to output an analog image signal and an analog audio signal, which are displayed on the monitor 52b and received by the receiver. It outputs from a speaker (L, R) via 40b.

  Next, a case where digital data is transferred from the data processing apparatus 10 to the portable recording medium 60 will be described based on FIG. 5 and the flowchart shown in FIG. Here, among the components of the signal processing system 100, the locations where the steps of the flowchart are executed and the locations where the data processed in the steps are transmitted are given the same step numbers as in FIG. This is shown in FIG.

  When there is an instruction input for outputting predetermined content data to the portable recording medium 60, the instructed content data in the HDD 11a is transferred to the USB block 11g corresponding to the portable recording medium 60 (the received content data is transferred to the USB). Converted into a protocol.) And output to the portable recording medium 60 (steps S37 and S38). In this case, conversely, the content data can be input from the portable recording medium 60 to the USB block 11g.

  As described above, in the signal processing system 100, 1) DVD content data (digital image data, digital audio data) is converted into an analog format by the recording medium playback device 30, and transmitted to the data processing device 10. Compared with the case where the data processing device 10 decodes the reproduction data of the DVD, the generated load is remarkably reduced. 2) The content data (digital image data, digital audio data) stored in the HDD 11a is reproduced by the client 20. In this case, since the content data is transmitted in the digital form to the client 20, the data processing apparatus 10 does not perform the analogization process (decoding process), so the load on the data processing apparatus 10 is significantly reduced. 3) Further, the recording medium by the client 20 When the DVD stored in the playback device 30 is played back, the data processing device 10 converts the DVD content data into the MEG4 format to reduce the amount of data, so the data output processing amount of the data processing device 10 is remarkably large. Is reduced.

  Therefore, as shown in the items 1) to 3) above, when individual content data is reproduced, the load on the data processing apparatus 10 is significantly reduced. As a result, a plurality of content data of various data formats can be efficiently and concurrently reproduced.

  Here, the detail of the effect shown to each item of said 1) -3) is shown in FIG. 16, FIG. FIG. 16 shows the relationship between the processing load of the encoder 11d and the simultaneous and parallel reproduction of two content data, and FIG. 17 shows the relationship between the processing load of the decoder 11f and the simultaneous and parallel reproduction of two content data. Both diagrams are 9-row 9-column matrices representing two content data (each of 9 patterns) as rows and columns (FIGS. 16 and 17 show the 9-row 9-column matrix due to the limitations of the drawings. Is divided into two stages, and is described as two matrices of 9 rows and 4 columns and 9 rows and 5 columns.) In each matrix element, two pieces of content data corresponding to the rows and columns of the matrix elements are simultaneously processed in parallel. Thus, the degree of load generated in the encoder 11d or the decoder 11f during reproduction is shown.

Hereinafter, with reference to FIG. 17, four examples in which the effects shown in the items 1) to 3) are remarkable are shown.
First example: Matrix element rows and columns are 6 (rows) to 3 (columns), that is, the client 20 reproduces the digital video data of the HDD 11a (sixth row), and the data processing apparatus 10 reproduces the recording medium. When the DVD of the apparatus 30 is reproduced (third row), the decoding process is greatly reduced as compared with the case where the DVD decoding process is performed by the data processing apparatus 10.

  Second example: Matrix element rows and columns are 5 (rows) to 3 (columns), that is, the client 20 reproduces the digital audio data of the HDD 11a (fifth row), and the data processing apparatus 10 reproduces the recording medium. When the DVD of the device 30 is reproduced (third column), the digital audio data for the client 20 is decoded inside the data processing device 10, and the DVD content data decoding processing of the data processing device 10 is performed in the data processing device. The processing amount of the decoder is greatly reduced as compared with the case where the processing is performed within the number 10.

  Third example: Matrix element rows and columns are 3 (rows) -4 (columns), that is, the data processing device 10 plays the DVD of the recording medium playback device 30 (third row), and the client 20 records When playing back a DVD of the medium playback device 30 (fourth column), if a plurality of recording medium playback devices 30 are connected to the data processing device 10, both the data processing device 10 and the client 20 play back the DVD. Although a case may occur, since it is not necessary to decode two contents for the data processing device 10 and the client 20 in the data processing device 10, the amount of decoder processing is greatly reduced.

  Fourth example: Matrix element rows and columns are 3 (rows) -6 (columns), that is, the data processing device 10 plays the DVD of the recording medium playback device 30 (third row), and the client 20 receives the HDD 11a. When the digital video data is reproduced (sixth column), the decoder processing amount of the data processing apparatus 10 is greatly reduced as described above. In the tables of FIGS. 16 and 17, the cells (columns) marked with “x” are combinations that are not supposed to be reproduced simultaneously.

  Note that the description in the present embodiment shows an example of the data processing apparatus and the program according to the present invention, and the present invention is not limited to this. The detailed configuration and detailed operation of the data processing apparatus 10 as the signal processing apparatus in the present embodiment can be changed as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, the content data is provided from the recording medium playback device, but is not limited to this. The present invention is also applicable to content received via the Internet. In this case, the content provided through the Internet may be a file format content or a stream format content.

It is a figure which shows MMS and its peripheral device to which this invention is applied with the flow of a process. It is a figure which shows MMS and its peripheral device to which this invention is applied with the flow of a process. It is a figure which shows MMS and its peripheral device to which this invention is applied with the flow of a process. It is a figure which shows MMS and its peripheral device to which this invention is applied with the flow of a process. It is a figure which shows MMS to which this invention is applied, and its peripheral device containing a portable recording medium with the flow of a process. It is an example of the menu screen used when switching the reproduction | regeneration function to which this invention is applied. It is a flowchart explaining the processing content shown in FIG. It is a flowchart explaining the processing content shown in FIG. It is a flowchart explaining the processing content shown in FIG. It is a flowchart explaining the processing content shown in FIG. It is a flowchart explaining the processing content shown in FIG. It is a flowchart explaining the processing content shown in FIG. It is a flowchart explaining the processing content shown in FIG. It is a flowchart explaining the processing content shown in FIG. It is a flowchart explaining the processing content shown in FIG. It is a figure which shows the effect produced with respect to the encoder shown in FIGS. It is a figure which shows the effect which arises with respect to the decoder shown in FIGS.

Explanation of symbols

10 Data processing device 11 Motherboard 11a, 22 HDD
11b, 11e Reception port 11c Processor 11d Encoder 11f Decoder 11g USB block 12 Output port 20 Client 21 Motherboard 30 Recording medium playback device 40a, 40b Receiver 50 RS232C expansion PC
51a, 51b Remote control conversion BOX
52a, 52b Monitor 53 HUB
60 Portable Recording Medium 100 Signal Processing System

Claims (7)

A receiving unit for receiving content data output from a plurality of content data supply means;
An encoder that encodes content data received via the receiver;
A decoder that decodes the content data received via the receiving unit;
An output unit for requesting transmission of content data received from the content data supply unit by designating content data stored in the plurality of content data supply units, and for outputting to a receivable client device;
With
A data processing apparatus that outputs second content data of another content data supply means to the output unit while receiving first content data from one content data supply means. A first receiver for receiving content data output from the first content data supply means;
A second receiver for receiving content data output from the second content data supply means;
An encoder that encodes content data received via the first receiver and / or the second receiver;
A decoder for decoding content data received via the first receiver or the second receiver;
Processing means for controlling the encoder and the decoder;
The content data received from the first content data supply means and / or the second content data supply means is received by designating the content of the first content data supply means or the second content data supply means. An output unit that outputs to a possible client device;
With
The second content of the first content data supply means or the second content data supply means while receiving the first content data of the first content data supply means or the second content data supply means. A data processing apparatus that outputs data to the output unit. The processing means includes
The encoder and the decoder are controlled so as to perform predetermined processing on the first content data received from the first content data supply means or the second content data supply means, and the first content data supply means Alternatively, the encoder and the decoder are controlled so as to perform predetermined processing on the second content data received from the second content data supply unit.
The data processing apparatus according to claim 2.   The reception processing of the first content and the output processing of the second content are executed using a multitasking function of Linux, which is an operating system. The data processing device according to any one of 1 to 3.   When content data is received in analog form from the first content data supply means, another image is superimposed on or received from the content data image received using the on-screen display function. 4. The data processing apparatus according to claim 2, wherein the content data in the analog format is digitized by controlling the encoder in order to separately display the content data image and another image.   The second content data supply unit stores the content data in a compressed format, and the output unit does not process the content data stored in the second content data supply unit by the encoder and the decoder. The data processing apparatus according to claim 2, wherein the data processing apparatus outputs the data to the data processing apparatus. On the computer,
A receiving unit that receives one or a plurality of content data, an encoder that encodes the content data received by the receiving unit, and a decoder that decodes the content data received by the receiving unit ) And a function for outputting the received content data to the client device and realizing a function of outputting other content data to the output unit while receiving one content data.

Images