JP2006180431A - Digital apparatus, method of connection of digital apparatus, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital apparatus with an input/output port performing the data transfer from/to the predetermined transmission path, one of two or more of the registers assigned for setting up the state of the input and the output of data from/to the transmission path of the input/output port, and a method which assigns any one of two or more of the registers to the input/output portion for controlling the input/output port based on the register. <P>SOLUTION: The digital apparatus 10 has at least one input/output port performing the input or output of data via transmission paths such as IEEE1394 serial bus, two or more of the PCR(s) for controlling the state of the input and output of data from/to the transmission path, and a PCR matrix management portion 15 which assigns any one of two or more of the PCR(s) to the input/output port according to predetermined conditions. The digital apparatus 10 controls the input/output port to enable to output and input data between the transmission paths based on the assigned PCR. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a digital device, a digital device connection method, and a program, and more particularly, to a digital device that can be connected to each other via a digital interface such as IEEE 1394, a connection method between the digital devices, and a program therefor .

  Recently, multiple digital devices such as digital television equipment (DTV), DVHS, AVHDD, and digital set-top box (DSTB) are connected to each other via a digital interface compliant with the IEEE 1394 standard, enabling high-speed data transfer. It has become. A method for performing connection management between such digital devices is defined in the IEC61883 standard.

  According to the IEC61883 standard, an input plug that serves as an entrance into which a bit stream flows into each digital device and an output plug that serves as an exit through which the bit stream flows out are defined, and each digital device has an oMPR (output Master Plug). Registers, oPCR (output Plug Control Resister), iMPR (input Master Plug Register), and iPCR (input Plug Control Resister) registers are managed to control input plugs (input ports) and output plugs (output ports) In addition, it manages the connection between digital devices.

  FIG. 13 is a functional block diagram showing a configuration example of a main part of a conventional digital device. In FIG. 13, reference numeral 100 denotes a digital device that can be connected to an IEEE 1394 serial bus. The digital device 100 is used by a user to input various operations. User interface (user I / F) 101, communication control unit 102 including a CPU, ROM, RAM, and the like (not shown), and an application that instructs the communication control unit 102 to establish a transmission path with other digital devices The connection management manager 103, the 1394 driver 104 that controls the 1394 interface by associating the input / output ports with the PCR, the PCR management unit 105 that manages the PCR, and the function of performing communication between the IEEE 1394 serial buses according to the IEEE 1394 protocol 139 composed of chips Interface and a (1394I / F) 106.

  The connection management manager 103 and the 1394 driver 104 are stored as programs in the ROM of the communication control unit 102, read out to the RAM at the time of execution, and processed by the CPU.

  The PCR management unit 105 manages PCR, which is a register that controls communication between IEEE1394 serial buses. This PCR is composed of an oPCR that controls an output port and an iPCR that controls an input port. This oPCR stores eight items such as “Channel number” indicating a channel number through which data is transmitted. The iPCR stores six items such as “Channel number” indicating a channel number through which data is transmitted.

  In addition to the oPCR and iPCR, there are oMPR and iMPR that store the hardware capability of the 1394 I / F 106. The oMPR stores six items such as “Data rate capability” indicating the hardware transmission rate capability of the IEEE 1394 I / F 106 and “Number of output plugs” indicating the number of output ports. The iMPR stores six items such as “Data rate capability” indicating transmission rate capability and “Number of input plugs” indicating the number of input ports. In addition, three data rates (transmission speeds) of 100 Mbps, 200 Mbps, and 400 Mbps are prepared as data rates that can be set in the PCR in the case of the IEEE 1394 standard.

  The above-described PCR is initialized by the PCR management unit 105 when the digital device 100 is turned on or reset, and an initial value is set. At this time, necessary data (for example, the data rate and the number of plugs) is read from the 1394 driver 104.

  Next, each unit will be described along a processing procedure for establishing a transmission path. For example, when transmitting a program signal received by the digital device 100 to another digital device, the connection management manager 103 instructs the communication control unit 102 to establish a transmission path between them. The communication control unit 102 exchanges with the 1394 driver 104 in accordance with a command from the connection management manager 103 to acquire a bandwidth (data rate) and a channel necessary for data transmission of the IEEE 1394 serial bus. This bandwidth is managed by an IRM (Isochronous Resource Manager) (not shown) connected to the IEEE 1394 serial bus.

  The communication control unit 102 outputs a read transaction to the PCR management unit 105 in order to secure a port for transmitting data. In response to the read transaction from the communication control unit 102, the PCR management unit 105 reads out the oPCR out of the PCR, and outputs the read result to the communication control unit 102 as a read response transaction. When the communication control unit 102 confirms that there is an empty port among the output ports from the read response transaction, the communication control unit 102 outputs a write transaction to the PCR management unit 105 in order to secure it. In response to this write transaction, the PCR management unit 105 writes predetermined items (reserved bandwidth (data rate), channel, etc.) to the oPCR. Then, the PCR management unit 105 controls the hardware of the 1394 I / F 106 so that actual communication can be performed via the IEEE 1394 serial bus according to the conditions set in the oPCR.

  Next, the communication control unit 102 outputs a write transaction to the 1394 driver 104 in order to secure an input port of another digital device. The 1394 driver 104 outputs the write transaction from the communication control unit 102 to the IEEE 1394 serial bus. When another digital device receives a write transaction from the communication control unit 102 of the digital device 100 from the IEEE 1394 serial bus, a predetermined item (reserved in the iPCR of the other digital device corresponding to the write transaction is secured. Write bandwidth, channel, etc.). When the other digital device successfully writes to the iPCR, it outputs a message to that effect as a write response transaction to the IEEE 1394 serial bus. When the communication control unit 102 receives a write response transaction from another digital device and confirms that writing to the iPCR of the other digital device is successful, it transmits data to the other digital device via the IEEE 1394 serial bus. To do.

  FIG. 14 is a diagram for explaining a procedure for establishing a transmission path in the conventional digital device 100. In the digital device 100, the PCR and the input / output port are set independently by the connection management manager 103 every time transmission is started / stopped and reception is started / stopped. 14A shows an example in the case of transmission start / stop, and FIG. 14B shows an example in the case of reception start / stop.

  14A, first, the 1394 driver 104 associates the input / output port with the PCR and sets various hardware of the input / output port to the 1394 I / F 106 (S101). The connection management manager 103 establishes a connection between the oPCR of the digital device 100 and an external PCR with respect to the 1394 driver 104 and the 1394 I / F 106 (S102). Next, at the start of transmission, the connection management manager 103 sets the input / output port to start transmission for the 1394 driver 104 and the 1394 I / F 106 (S103), and sets the PCR to “online” (S104). . When the transmission is stopped, the connection management manager 103 sets the input / output port to the transmission stop for the 1394 driver 104 and the 1394 I / F 106 (S105), and sets the PCR to “offline” (S106).

  14B, first, the 1394 driver 104 associates the input / output port with the PCR and sets various hardware of the input / output port to the 1394 I / F 106 (S111). At the start of reception, the 1394 I / F 106 notifies the 1394 driver 104 and the connection management manager 103 of the start of stream reception to the input / output port (S112). Next, the connection management manager 103 sets the input / output port to start reception for the 1394 driver 104 and the 1394 I / F 106 (S113), and sets the PCR to “online” (S114). When the reception is stopped, the 1394 I / F 106 notifies the 1394 driver 104 and the connection management manager 103 that the reception of the stream to the input / output port is stopped (S115). Next, the connection management manager 103 sets the input / output port to the reception stop for the 1394 driver 104 and the 1394 I / F 106 (S116), and sets the PCR to “offline” (S117).

  In the conventional digital device 100 described above, the input / output ports and the PCR have a one-to-one correspondence, and there is a limitation that only the number of input / output ports can prepare the PCR. Further, the number of input / output ports is limited due to the relationship of the 1394 driver 104, and accordingly, the number of PCRs that can be prepared is also limited. This will be described with reference to FIG.

  FIG. 15 is a diagram for explaining the correspondence between the input / output ports of the conventional digital device 100 and the PCR. In this example, the 1394 I / F 106 includes three input / output ports (Port # 0, Port # 1, and Port # 2). The PCR 107 is composed of a total of four PCRs: two oPCRs (oPCR [0], oPCR [1]) and two iPCRs (iPCR [0], iPCR [1]). Conventionally, since PCR is associated with input / output ports on a one-to-one basis, the input / output ports corresponding to iPCR [1] are insufficient, and iPCR [1] cannot be used.

  The present invention has been made in view of the above circumstances, and includes at least one input / output port for inputting / outputting data to / from a transmission path such as an IEEE 1394 serial bus, and a transmission path for the input / output port. In a digital device comprising a plurality of registers for setting the input / output state of data to / from, one of the plurality of registers is assigned to the input / output port, and the input / output port can be controlled based on the register It was made for the purpose of.

  In order to solve the above-described problem, the first technical means of the present invention includes at least one input / output means for inputting or outputting data to / from a predetermined transmission path, and the input / output means for the transmission path. A digital device comprising a plurality of registers for controlling the state of data input / output, wherein the digital device assigns one of the plurality of registers to the input / output means according to a predetermined condition An allocating unit is provided, and the input / output unit can be controlled so that data can be input / output to / from the transmission path based on the allocated register.

  A second technical means is characterized in that, in the first technical means, the register assigning means can switch a register assigned to the input / output means to another register.

  According to a third technical means, in the first or second technical means, when the plurality of input / output means are provided, the register assigning means assigns a different register to each of the plurality of input / output means. It is a thing.

  According to a fourth technical means, in any one of the first to third technical means, the register is an input register for setting the input / output means for data input, and the input / output means is for data output. The input / output means is configured to input data from the transmission path when the input register is allocated, and to the transmission path when the output register is allocated. It is characterized by outputting data.

  A fifth technical means includes an active state in which data input / output is enabled and an inactive state in which data input / output is disabled in any one of the first to fourth technical means. A means for setting one of the states in the input / output means, wherein the register allocating means sets the register corresponding to the input / output means online when the active state is set, and sets the inactive state The register corresponding to the input / output means is offline.

  According to a sixth technical means, in the fifth technical means, the input / output means is capable of setting information relating to data inputted / outputted to / from the transmission path, and the register allocating means has the input / output means In the active state, the register corresponding to the input / output means is set based on the information related to the data.

  According to a seventh technical means, in the fifth technical means, the number of registers that can be brought online among the registers is less than or equal to the number of the input / output means.

  The eighth technical means is any one of the first through seventh technical means, wherein the register allocating means is a call for instructing start / stop of transmission / reception of data input / output to / from the transmission path. A back function is set.

  A ninth technical means is any one of the first to eighth technical means, wherein the transmission path is an IEEE 1394 serial bus.

  A tenth technical means is for controlling at least one input / output means for inputting / outputting data to / from a predetermined transmission path, and a state of data input / output to / from the transmission path of the input / output means. In a connection method of a digital device including a plurality of registers, a step of assigning any one of the plurality of registers to the input / output means according to a predetermined condition, and the transmission path based on the assigned registers And the step of controlling the input / output means so as to be able to input / output data between them.

  The eleventh technical means is a program for executing a function as a digital device in any one of the first to ninth technical means.

  According to the present invention, at least one input / output port for inputting / outputting data to / from a transmission path such as an IEEE 1394 serial bus, and a data input / output state for the transmission path of the input / output port are set. In a digital device having a plurality of registers, any one of a plurality of registers can be assigned to an input / output port, and the input / output port can be controlled based on that register. The register can be switched by switching as appropriate.

  FIG. 1 is a diagram showing a state in which digital devices according to an embodiment of the present invention are connected via an IEEE 1394 serial bus. In FIG. 1, 1 denotes an IEEE 1394 serial bus, and 10 and 20 denote digital devices. The digital devices 10 and 20 are digital devices such as DTV, DVHS, AVHDD, and digital set top box, and are connected to each other via the IEEE 1394 serial bus 1.

  FIG. 2 is a functional block diagram showing a configuration example of a main part of the digital device 10 shown in FIG. 1. A user interface (user I / F) 11 for allowing the user to input various operations on the digital device 10 is not shown. A communication control unit 12 composed of a CPU, ROM, RAM, etc., a connection management manager 13, which is an application for instructing the communication control unit 12 to establish a transmission path with other digital devices 20, an input / output port and a PCR 1394 driver 14 for controlling the 1394 interface (1394 chip) in association with each other, PCR matrix management unit 15 for managing PCR using a PCR matrix, which will be described later, and a function for communicating with IEEE 1394 serial bus 1 in accordance with the IEEE 1394 protocol 1394 interface consisting of various chips It has an over scan (1394I / F) 16.

  The connection management manager 13 and the 1394 driver 14 are stored as programs in the ROM of the communication control unit 12, and are read into the RAM at the time of execution and executed by the CPU. The digital device 10 of the present invention is different from the digital device 100 shown in FIG. 13 in that it includes a PCR matrix management unit 15. The input / output means of the present invention corresponds to an input / output port, the register corresponds to PCR (oPCR, iPCR), and the register allocation means corresponds to the PCR matrix management unit 15. The input / output port is any of an input-only port, an output-only port, and an input / output shared port.

  FIG. 3 is a diagram for explaining the PCR matrix function executed by the PCR matrix management unit 15. In the figure, M is a PCR matrix managed by the PCR matrix management unit 15, and P1 and P2 are on the PCR matrix M. Indicates the contact to be set. In this example, the 1394 I / F 16 includes three input / output ports (Port # 0, Port # 1, and Port # 2). The PCR 17 is composed of a total of four PCRs: two oPCRs (oPCR [0], oPCR [1]) and two iPCRs (iPCR [0], iPCR [1]). The number of input / output ports and PCRs is not limited to this.

  FIG. 4 is a diagram illustrating a configuration example of an input / output port in the 1394 I / F 16. The input / output ports (Port # 0, Port # 1, Port # 2) are input / output pins on the 1394 I / F 16 and are usually provided with a finite number of about 2-3. Input / output from the 1394 port is assigned to the input / output ports (Port # 0, Port # 1, Port # 2) according to the setting from the 1394 driver 14.

  FIG. 5 is a diagram illustrating a configuration example of a register for controlling input / output of logical data. FIG. 5A is a diagram illustrating a configuration example of the output register, and the output register includes oMPR and oPCR [0] to [n]. FIG. 5B is a diagram illustrating a configuration example of the input register, and the input register includes iMPR and iPCR [0] to [n]. The relationship between the input / output port and the PCR is logical, and it is only necessary that the input / output port and the PCR be associated only when data transmission / reception is necessary.

  In the present invention, the PCR matrix M is defined as a function for associating the 1394 I / F 16 (input / output port) with the PCR 17, exists between the 1394 I / F 16 (input / output port) and the PCR 17, and follows a predetermined rule. A contact point can be set at the intersection of each line segment in the PCR matrix M. The PCR matrix management unit 15 has a function of managing and controlling PCR by the PCR matrix M. The PCR matrix M includes four PCRs (oPCR [0], oPCR [1], iPCR [0], etc.) for each input / output port (Port # 0, Port # 1, Port # 2) depending on the position of the contact. Any one of iPCR [1]) is assigned. In this example, a contact P1 is set between Port # 0 and oPCR # 0, and a contact P2 is set between Port # 1 and iPCR # 0. This indicates that Port # 0 and oPCR # 0, and Port # 1 and iPCR # 0 are in a connectable state.

  The PCR matrix M includes, for example, a function for switching “active” and “inactive” of an input / output port, a function for setting a contact point between the input / output port and the PCR, and stream information (stream type, bandwidth, CIP, etc.) at the output port. ), A function for obtaining PCR information at the point of contact from an input / output port number, a function for setting a callback function for stream transmission / reception, a function for reflecting the current stream state, and a stream A function for performing stream control such as start / stop of transmission / reception of data is provided as an API (application program interface), and various processes can be executed.

  In FIG. 3, as a rule for setting contacts in the PCR matrix M, it is not possible to set two or more contacts on a line segment in the PCR matrix M. That is, a different PCR is always assigned to each input / output port. Further, it is not always necessary to set a contact point on the line segment. The PCR matrix M can assign an arbitrary PCR to each input / output port by switching the contact between the input / output port and the PCR according to this fixed rule.

  In addition, the input / output port can set either an active state or an inactive state, and the online bit of the PCR at the tip of the contact changes according to this state. That is, when the active state is set for the input / output port, the PCR matrix management unit 15 sets the PCR corresponding to the input / output port to online, and when the inactive state is set for the input / output port, the input / output port Let PCR be the offline. At the same time, this active / inactive corresponds to the input / output state of the input / output port, and if active, it indicates that the stream can be transmitted and received. The connection management manager 13 executes an input / output port active / inactive switching process. Note that the number of PCRs that can be online is equal to or less than the number of input / output ports.

  The PCR matrix management unit 15 can dynamically allocate a plurality of PCRs to one input / output port using the PCR matrix M. For example, in the PCR matrix M shown in FIG. 3, when the contact P1 is moved to the contact of “Port # 0” and “oPCR [1]”, the stream is output from “oPCR [1]” and “oPCR Stream output to [0] ”stops. At this time, since only one contact can be set for each input / output port, it is necessary to delete the contact of “oPCR [0]” when switching from “oPCR [0]” to “oPCR [1]”. Absent. This can be done for iPCR as well.

  The PCR matrix management unit 15 can dynamically switch one input / output (bidirectional) port from input to output or from output to input by the PCR matrix M. The PCR is configured by either an iPCR for setting an input / output port for data input or an oPCR for setting an input / output port for data output. Therefore, the input / output port functions as an input port for inputting data from the IEEE 1394 serial bus 1 when the iPCR is allocated, and functions as an output port for outputting data to the IEEE 1394 serial bus 1 when the oPCR is allocated. .

  For example, in the PCR matrix M shown in FIG. 3, by moving the contact P1 to the contact of “Port # 0” and “iPCR [0]”, one “Port # 0” is transferred to the oPCR ( Output) to iPCR (input). This input / output change processing can be executed in the case of an input / output shared port. Note that the iPCR is always assigned to the input-only port, and the oPCR is always assigned to the output-only port. As a result, various functions can be realized with a small number of input / output ports.

  The PCR matrix management unit 15 can set information on a stream input to or output from the input / output port for the input / output port. When the input / output port state is “active” and the contact point is set, the PCR matrix management unit 15 sets the PCR based on the stream information and starts transmission / reception of the stream. The stream information is information such as a stream type (for example, MPEG2-TS) described later.

  FIG. 6 is a diagram for explaining an example of a procedure for establishing a transmission path in the digital device 10 of the present invention. FIG. 6A shows an example of transmission start / stop, and FIG. 6B shows an example of reception start / stop.

  6A, first, the 1394 driver 14 sets various hardware of the input / output port for the 1394 I / F 16 (S1). The connection management manager 13 establishes a connection between the PCR of the digital device 10 and the external PCR with respect to the 1394 driver 14 and the 1394 I / F 16 (S2).

  Next, at the start of transmission, the connection management manager 13 instructs the 1394 driver 14 to set the input / output port to “inactive” (S 3), and the 1394 driver 14 instructs the 1394 I / F 16. The input / output port is set to stop (S4). Next, the connection management manager 13 designates the relation between the PCR to be enabled and the input / output port to the 1394 driver 14 (S5). The 1394 driver 14 sets the PCR to “offline” for the 1394 I / F 16 (S6).

  Next, the connection management manager 13 instructs the 1394 driver 14 to set the input / output port to “active” (S7), and the 1394 driver 14 transmits the input / output port to the 1394 I / F 16. The start is set (S8), and the PCR is set to “online” (S9).

  When another transmission is started, the connection management manager 13 instructs the 1394 driver 14 to set the input / output port to “inactive” (S10), and the 1394 driver 14 instructs the 1394 I / F 16. The input / output port is set to stop (S11). Next, the connection management manager 13 specifies the relation between the PCR to be enabled and the input / output port to the 1394 driver 14 (S12). The 1394 driver 14 sets the PCR to “offline” for the 1394 I / F 16 (S13).

  Next, the connection management manager 13 instructs the 1394 driver 14 to set the input / output port to “active” (S14), and the 1394 driver 14 transmits the input / output port to the 1394 I / F 16. The start is set (S15), and the PCR is set to “online” (S16).

  In FIG. 6B, first, the 1394 driver 14 sets various hardware of the input / output port for the 1394 I / F 16 (S21). Next, the connection management manager 13 designates the relation between the PCR to be enabled and the input / output port to the 1394 driver 14 (S22).

  At the start of reception, the 1394 I / F 16 notifies the 1394 driver 14 of the start of stream reception to the input / output port (S23). Next, the 1394 driver 14 sets the input / output port to start reception with respect to the 1394 I / F 16 (S24), and sets the PCR to “online” (S25).

  When the reception is stopped, the 1394 I / F 16 notifies the 1394 driver 14 that the reception of the stream to the input / output port is stopped (S26). Next, the 1394 driver 14 sets the input / output port to the reception stop for the 1394 I / F 16 (S27), and sets the PCR to “offline” (S28).

  FIG. 7 is a diagram illustrating an example of a correspondence relationship between a PCR state and a stream transmission / reception state. In this example, for each oPCR and iPCR, the state of the contact in the PCR matrix M, the state of the input / output port corresponding to the contact, the state of presence / absence of “Connection” which is a connection function between PCRs defined in IEC61883, , The online bit state of PCR, the band / channel reservation state, and the stream transmission / reception state.

  The PCR matrix M exists independently of “Connection” of IEC61883, and it is necessary to change the stream transmission / reception state depending on the PCR state. At this time, a change in the PCR is monitored in order to instruct the connection management manager (application) 13 of the timing of transmission / reception of the stream with a callback function. The PCR matrix M performs a process of changing the PCR or generating a callback depending on the set value and the presence / absence of a connection.

  The callback is generated when the stream is switched from a transmission state to a stop state, for example. The connection management manager 13 only needs to control transmission / reception of a stream based on this callback information. The callback is provided externally because the input / output port switching and the stream transmission / reception timing vary in the stream transmission / reception processing.

Hereinafter, the processing from the definition of the PCR matrix M to the start of stream transmission / reception will be described with reference to FIGS.
First, when using the PCR matrix M, input / output ports and PCR are defined. With regard to input / output ports, the number of input / output ports and the state of each input / output port (for example, transmission only, reception only, transmission / reception shared, or not used) are defined. Also for PCR, define the desired number of iPCRs and oPCRs.

  FIG. 8 is a flowchart for explaining an example of processing for setting a contact between the input / output port and the PCR. First, the PCR matrix management unit 15 determines whether the state of the input / output port is “inactive” (step S31). If the state is “inactive” (in the case of YES), the input / output direction of the input / output port is determined. And whether the PCR matches (step S32). If the input / output directions match (YES), it is determined whether there is no other contact in the PCR (step S33), and there is no other contact. If it is (YES), it is determined whether or not there is a contact (step S34). If there is already a contact (YES), the contact information is deleted (step S35).

  In addition, in step S31, when the state is not “inactive” (in the case of NO), the PCR matrix management unit 15 in step S32, in the case where the input / output directions do not match (in the case of NO), in step S33, If there is another contact (in the case of NO), an error process is performed and the process ends. In step S34, if there is no contact (NO), the process proceeds to step S36.

  Next, the PCR matrix management unit 15 determines whether or not PlugNo = -1 is set in the PCR (step S36). When PlugNo = -1 is set (in the case of YES), the contact is deleted. To finish. On the other hand, if a value other than PlugNo = −1 is set in step S36 (NO), the contact information is set (step S37), and the process ends.

Further description will be made using the PCR matrix M shown in FIG. The PCR matrix M is activated by the activation function of the 1394 driver 14. At this time, since input / output ports and contacts are not set, it is necessary to make these settings simultaneously with the start of the connection management manager 13. Therefore, the following processes (1) and (2) are performed.
(1) Define a callback function for stream control used by the PCR matrix management unit 15. This callback function is a function that is called when transmission stop of a stream occurs. An implementation example of the callback function will be described with reference to FIG.
(2) A contact P1 that assigns “oPCR [0]” to “Port # 0” and a contact P2 that assigns “iPCR [0]” to “Port # 1” are set. At this stage, the port state is not set to “active”.

  FIG. 9 is a flowchart for explaining an example of processing for setting port (stream) information to an input / output port. First, the PCR matrix management unit 15 determines whether the state of the input / output port is “inactive” (step S41). If the state is “inactive” (in the case of YES), the parameter is out of range. Whether or not the parameter is not out of the range, that is, within the range (in the case of NO), the port information is registered (step S43), and the process is terminated. In step S41, if the state is not "inactive" (NO), if the parameter is out of range (YES) in step S42, error processing is performed and the process ends.

Here, in the PCR matrix M shown in FIG. 3, the following process (3) is performed following the processes (1) and (2).
(3) Information on the stream output from “Port # 0” and “Port # 1” is set. This sets what kind of stream transmission / reception is performed at the input / output port. The following information can be set as stream information, and in the case of reception, only StreamType is set.
StreamType: sets the type of stream. For example, MPEG2-TS.
CIP [0], CIP [1]: Set the CIP header of the stream.
-Band: Specifies the number of source packets to be transmitted in the ISO cycle. For example, BS digital broadcasting is 3, CS digital broadcasting is 5, etc.
PktSize: 1 specifies the packet size of the source packet. For example, in the case of MPEG2-TS, it is 188 + 4, 4 of which is a packet header.
TimeShiftFlag: A value set in CIP [1], but specified independently. For example, 1 indicates a recorded stream, and 0 indicates a broadcast stream.
Payload: When there is a contact, specify the value of Payload (bandwidth) set in the oPCR. For example, 146 in the case of CS digital broadcasting.

  FIG. 10 is a flowchart for explaining an example of processing for setting PCR to online. First, the PCR matrix management unit 15 determines whether or not there is a contact in the PCR matrix M (step S51). If there is a contact in the PCR matrix M (in the case of YES), whether there is a stream definition in the case of oPCR. Whether there is a stream definition (in the case of YES), the input / output direction of the input / output port is set from the contact (step S53). If PCR is iPCR, set to input. If oPCR, set to output.

  The PCR matrix management unit 15 performs error processing when there is no contact in the PCR matrix M in the above step S51 (in the case of NO), or when there is no stream definition in the above step S52 (in the case of NO). finish.

  Next, when output, if the oPCR Payload and the input / output port Payload do not match, the PCR matrix management unit 15 secures and releases the bandwidth in the IRM, and resets the oPCR Payload (step S54). The port information is set to “active” (step S55), and the corresponding PCR is set to “online” (step S55). At this time, the callback function is called to start transmission / reception of the stream.

Here, in the PCR matrix M shown in FIG. 3, the following processes (4) and (5) are performed following the processes (1) and (2) described above.
(4) “PCR” is set to “online” (input / output port is set to “active”). For example, “Port # 0” is set to “active”, “oPCR [0]” is set to “online”, and “Port # 1” is set to “active” to set “iPCR [0]” to “active”. online ".
(5) Send and receive streams. For example, when “Port # 0” becomes “active”, if there is a connection to the PCR (“oPCR [0]”) corresponding to “Port # 0”, the PCR matrix management unit 15 starts transmission / reception of the stream In order to do so, the callback function is called to start transmission / reception of the stream. On the other hand, if there is no connection, the callback function is not called and transmission / reception of the stream is not started. Therefore, the connection management manager 13 need only execute connection management without considering any stream processing, so that the implementation is simplified.

  FIG. 11 is a flowchart for explaining an example of processing for setting PCR to offline. First, the PCR matrix management unit 15 sets the corresponding PCR to “offline” (step S61). At this time, the callback function is called to stop transmission / reception of the stream. Next, the input / output direction of the input / output port is set to “HighImp” (step S62), and the port information is set to “inactive” (step S63). In step S62, basically, it is preferable to set the input to “Disable”.

The above offline process will be further described using the PCR matrix M shown in FIG.
(1) The PCR is set to “offline” (the input / output port is set to “inactive”). For example, by setting “Port # 0” to “inactive”, “oPCR [0]” is set to “offline”, and “Port # 1” is set to “inactive” to set “iPCR [0]” to “inactive”. offline ". Even when there is no contact between the PCR and the input / output port, the PCR is “offline”. However, since the contact of the input / output port in the “active” state cannot be deleted, the contact is deleted after setting the input / output port to “inactive” once.
(2) Send and receive streams. For example, when “Port # 0” becomes “inactive”, if there is a connection to the PCR corresponding to “Port # 0” (“oPCR [0]”), the PCR matrix management unit 15 stops transmission / reception of the stream Therefore, the callback function is called to stop transmission / reception of the stream. On the other hand, if there is no connection, the callback function is not called and transmission / reception of the stream is not stopped. Similarly, when the connection is deleted, the callback function can be called.

  FIG. 12 is a flowchart for explaining an implementation example of a callback function for executing a stream transmission / reception start process or stop process. First, the PCR matrix management unit 15 determines whether it is transmission or reception (step S71). If it is transmission, it determines its state (state) (step S72). If transmission is stopped, it calls PCRMatrix_StreamCtrl () ( In step S73), a Demux (not shown) is operated so as to stop the stream of the corresponding port of the 1394 I / F 16 (step S74). Here, Demux is an external circuit connected to the 1394 I / F 16.

  If the transmission is started in step S72, the PCR matrix management unit 15 operates Demux so that the stream flows to the corresponding port of the 1394 I / F 16 (step S75), and calls PCRMatrix_StreamCtrl () (step S76).

  In addition, in step S71, the PCR matrix management unit 15 determines the state (state) in the case of reception (step S77), and if reception is stopped, calls PCRMatrix_StreamCtrl () (step S78) and 1394 I / F16. Reception of the stream from is stopped (step S79).

  In addition, when reception starts in step S77, the PCR matrix management unit 15 calls PCRMatrix_StreamCtrl () (step S80), and operates Demux to receive a stream from the 1394 I / F 16 (step S81).

  Here, the PCR matrix management unit 15 monitors that the input / output direction of the stream set in the 1394 I / F 16 has actually been changed by executing the above-described PCRMatrix_StreamCtrl () function.

  As described above, each embodiment has been described centering on each function in the digital device according to the present invention. However, the present invention is a form as a connection method of a digital device as described also as a method of executing each step in the digital device. I can take it. Moreover, the form as a program for functioning as this digital apparatus and the form as a recording medium which recorded the program are also possible.

  An embodiment of a recording medium storing a program and data according to the present invention will be described. Specific recording media include CD-ROM (R / RW), magneto-optical disk, DVD-ROM (R / RW / RAM), FD, HD, flash memory, memory card, memory stick, and other various types. A ROM, a RAM, and the like can be assumed, and by realizing a program for executing the function as the digital device of each embodiment of the present invention described above on the recording medium and distributing it, the function can be easily realized. Then, the recording medium as described above is mounted on the digital device and the program is read by the digital device, or the program is stored in a storage medium included in the digital device and is read as necessary. It is possible to execute a connection function of a digital device related to the.

It is a figure which shows the state which connected the digital apparatus which concerns on one Embodiment of this invention via the IEEE1394 serial bus. It is a functional block diagram which shows the principal part structural example of the digital apparatus shown in FIG. It is a figure for demonstrating the PCR matrix function performed by the PCR matrix management part. It is a figure which shows the structural example of the input / output port in 1394I / F. It is a figure which shows the structural example of the register for controlling input / output of logical data. It is a figure for demonstrating an example of the establishment procedure of the transmission path | route in the digital device of this invention. It is a figure which shows an example of the correspondence of the state of PCR, and the transmission / reception state of a stream. It is a flowchart for demonstrating an example of the process which sets a contact between an input / output port and PCR. It is a flowchart for demonstrating an example of the process which sets port (stream) information to an input / output port. It is a flowchart for demonstrating an example of the process which sets PCR to online. It is a flowchart for demonstrating an example of the process which sets PCR to offline. It is a flowchart for demonstrating the implementation example of the callback function for performing the start process or stop process of transmission / reception of a stream. It is a functional block diagram which shows the example of a principal part structure of the conventional digital apparatus. It is a figure for demonstrating the establishment procedure of the transmission path | route in the conventional digital apparatus. It is a figure for demonstrating the correspondence of the input / output port which conventional digital equipment has, and PCR.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... IEEE1394 serial bus, 10, 20, 100 ... Digital equipment, 11, 101 ... User I / F, 12, 102 ... Communication control part, 13, 103 ... Connection management manager, 14, 104 ... 1394 driver, 15 ... PCR Matrix management unit, 16, 106 ... 1394 I / F (chip), 17, 107 ... PCR, 105 ... PCR management unit.

Claims (11)

  Digital comprising at least one input / output means for inputting / outputting data to / from a predetermined transmission path, and a plurality of registers for controlling the input / output state of data to / from the transmission path of the input / output means In the device, the digital device includes a register allocating unit that allocates any one of the plurality of registers to the input / output unit according to a predetermined condition, and is connected to the transmission path based on the allocated register. A digital device characterized in that the input / output means can be controlled so that data can be input / output with a computer.   2. The digital device according to claim 1, wherein the register allocating unit can switch a register allocated to the input / output unit to another register.   3. The digital apparatus according to claim 1, wherein when the plurality of input / output units are provided, the register allocation unit allocates a different register to each of the plurality of input / output units.   4. The digital apparatus according to claim 1, wherein the register includes an input register for setting the input / output means for data input, and an output for setting the input / output means for data output. The input / output means inputs data from the transmission path when the input register is assigned, and outputs data to the transmission path when the output register is assigned. A digital device characterized by   5. The digital device according to claim 1, wherein an active state in which data input / output is enabled for the transmission path and an inactive state in which data input / output is disabled are performed. Means for setting in the input / output means, wherein the register allocating means sets the register corresponding to the input / output means online when the active state is set, and the input / output means when the inactive state is set. A digital device characterized in that the register corresponding to is offline.   6. The digital device according to claim 5, wherein the input / output unit can set information regarding data input / output to / from the transmission path, and the register allocation unit is configured to enable the input / output unit to be in an active state. And setting a register corresponding to the input / output means based on the information on the data.   6. The digital apparatus according to claim 5, wherein the number of registers that can be brought online among said registers is equal to or less than the number of said input / output means.   8. The digital device according to claim 1, wherein the register allocating unit is set with a callback function for instructing start / stop of transmission / reception of data input / output to / from the transmission path. A digital device characterized by   9. The digital device according to claim 1, wherein the transmission path is an IEEE 1394 serial bus.   Digital comprising at least one input / output means for inputting / outputting data to / from a predetermined transmission path, and a plurality of registers for controlling the input / output state of data to / from the transmission path of the input / output means In the device connection method, assigning any one of the plurality of registers to the input / output means according to a predetermined condition, and inputting / outputting data to / from the transmission path based on the assigned register And a step of controlling the input / output means so as to be able to perform the operation.   The program for performing the function as a digital apparatus of any one of Claim 1 thru | or 9.

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