JP3492567B2 - Digital AV system capable of mutual data transmission and reception - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital AV system capable of mutually transmitting and receiving data, and more particularly, to a plurality of AV devices having individual digital signal processing functions. For example, by connecting each AV device through a digital interface capable of mutual transmission and reception such as the IEEE 1394 standard, digital data that cannot be processed by a single AV device can be processed as a whole system. The present invention relates to a digital AV system that realizes digital data processing. [0002] In digital AV equipment, for example, M
PEG2, DVC, Dolby AC-3, MD (AT
There are various digital data formats, such as RAC). These data are subjected to signal processing such as decoding in a single device, but format data for which each device does not have a processing function is discarded without any processing. Alternatively, processing for performing format conversion is added, or a processing function is added in order to enable signal processing of a plurality of data formats in an arbitrary device. For example, in digital CS broadcasting, data for data broadcasting is broadcast in addition to MPEG2 AV data. However, a general digital CS receiver is equipped with only an MPEG2 AV decoder. Is not subjected to data processing or a personal computer (P
The receiving system is added to another device having a processing function such as C) to perform decoding. Further, since digital interconnection between AV devices is not performed, data cannot be transmitted / received between AV devices, and there are digital AV devices having various digital data processing functions as a system. Nevertheless, it is currently functioning independently. [0004] However, discarding data that cannot be processed without using it means that the original digital data service is wasted. In addition, since the connection between the AV devices is not made, adding a processing function of another device to a certain device leads to an increase in system cost as well as duplication of the processing function. Accordingly, in the present invention, by connecting each AV device with a digital interface, it is possible to transmit and receive digital data to and from each other, and the digital data received by a specific AV device is processed by its own AV device. For data that cannot be transferred, the data is transferred to another processable AV device and processed by the other AV device.
It is an object of the present invention to construct a system that can process a plurality of format data or services as a whole system and avoid duplication of processing functions. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the first means is that a plurality of As having different digital data processing functions are provided.
V equipment are connected to each other via a transceiver capable connection interfaces digital data, said plurality of AV
At least one AV device of the plurality of AV devices;
Table related to digital data processing function of the system
For digital data that can not be processed by a specific AV device, the AV device having the function table
Other AV equipment capable of processing digital data
After searching and selecting based on the table, the selected
Transmitted to the other AV apparatus, by the other AV apparatuses receiving the digital data is processed, in the mutual transmission receivable digital AV system data to be processed as a whole system, digital as the AV equipment
Digital broadcast receiver, and data different from AV data.
Received digital data, including digital broadcast data,
Digital data that can be processed by its own receiving device and the other
Separated into digital data that can be processed by AV equipment,
To process digital data that can be processed by other AV equipment
Searches and selects the other AV device at
Transmitting the digital data through the
The other AV device that has received the digital data
Decoding data . An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the digital AV system of the present invention. Digital A
V system is digital CATV receiver 1, digital B
S receiver 2, first digital CS receiver 3, second digital CS receiver 4, monitor 5, personal computer 6 (hereinafter, referred to as PC), minidisc recorder / player 7 (hereinafter, referred to as MD), DVD It is composed of AV equipment such as a player 8 and a digital video camera 9 (hereinafter referred to as DV). The AV devices 1 to 9 are connected to each other via a connection interface capable of transmitting and receiving digital data in a tree shape. The processing functions of the digital data possessed by the respective AV devices 1 to 9 are not the same, and an example of a format which can process the digital data possessed by the respective AV devices is, for example, a function table shown in Table 1. It will be. The function of constructing the function table shown in Table 1 may be provided in at least one AV device among a plurality of AV devices constituting the system.
V equipment may be provided. Then, when another AV device is connected to an AV device having a function of constructing a function table, the processing capability of each AV device for digital data is recognized, and a function table is constructed. [Table 1] In this embodiment, a digital CATV receiver 1 is used as a means for receiving digital data from outside the system.
It includes a digital BS receiver 2, a first digital CS receiver 3, and a second digital CS receiver 4. The digital CATV receiver 1 of FIG. 1 receives a digital cable broadcast via a cable 1a. The digital BS receiver 2 and the first and second digital CS receivers 3 and 4
Receives S broadcast and CS broadcast. The AV system has the external antennas 2a, 3a, and 4a, and the AV system has a plurality of antenna systems. However, the common antenna system may be connected to any of the receivers and shared by each device. In the embodiment shown in FIG. 1, one or a plurality of IEEE 1394 interfaces are provided as digital connections for each AV device, and each A is connected by an IEEE 1394 cable.
The V devices are connected without forming a loop structure.
By being connected by the IEEE1394 interface, data transfer between each AV device is transmitted and received at a high speed of 100 Mbps or more. Further, the bus arbitration function prevents a single device from occupying the bus. Further, the node ID of each AV device is automatically assigned by the plug and play function, thereby facilitating the management of the connection and the functional characteristics of the connected device. Next, specific data transmission / reception under the AV system having the configuration of the embodiment shown in FIG. 1 will be described. In FIG. 2, a digital CS broadcast is considered as a digital data input to the system, and a first digital CS receiver 3 is the receiving device. The first digital CS receiver 3 has a function of constructing a management table of a format of data that can be processed by another AV device connected by the IEEE 1394 interface as shown in Table 1, and each AV device At this point, the processing capability of the AV device is recognized. Normally, the video and audio coding scheme of digital CS broadcasting is based on MPEG2. For this reason, the CS receiver has only the MPEG2 decoding function. Now, in the broadcasting service, the video is MPEG2, but the audio is different from the MPEG2 format, for example, a different format such as Dolby AC-
In the case where audio data is broadcast on 5.1ch 3 to provide another audio effect service, the first digital CS receiver 3 cannot perform decoding / reproduction. At this time, an AV device capable of decoding Dolby AC-3 is searched from the function table of Table 1, and for example, the digital BS receiver 2,
Alternatively, the user selects the DVD player 8 and transfers the data after confirming the state of the device from the AV / C command of the IEEE1394 standard. In the example shown in FIG.
Assuming that the data has been transferred to the receiver 2, the digital BS receiver 2 receives the received data and decodes / reproduces it. As described above, the first system
By transferring the data to be discarded if only the digital CS receiver 3 is to the digital BS receiver 2, it is possible to receive another service, and from outside the system, data switching of AV equipment can be performed. Processing can be performed without sensing. In a similar case, for example, when video data of the digital video standard (DV) is sent as a broadcast, the video data cannot be decoded by the first digital CS receiver 3 and is transferred to the digital video camera 9 connected via the IEEE1394 interface. , It is also possible to play. Next, digital cable broadcasting is considered as input of digital data. As shown in FIG. 3, the receiving device is a digital CATV receiver 1. As shown in Table 1,
The format of video / audio that can be processed by the digital CATV receiver 1 is MPEG2.
L decoding function. At this time, the digital cable broadcast video service is in the MPEG2 format,
MP @ HL, which is a high-level upper-layer standard generally called
Considering the case of broadcasting in a mixture of digital CATV
Since the decoding process cannot be performed in the receiver 1, an attempt is made to transfer data to another device. Here, the digital CS receiver 3
As described in the case (1), a management table of another AV device is constructed, search / selection is performed, and data is transferred. In this embodiment, since the digital BS receiver 2 has the function of decoding MP @ HL, the data is transmitted to the digital BS
The digital CAT is transferred via the IEEE 1394 interface, subjected to decoding processing, and played back video.
Although the V-receiver does not have the decoding function of MP @ HL, the service of the high-level image of MP @ HL can be processed as a digital AV system. Finally, FIG. 4 shows a case where the first digital CS receiver 3 receives data broadcasting other than video / audio data. When transmitting data such as information on a received service other than the AV data, the first digital C
Although the S receiver 3 does not have the decoding processing function as shown in Table 1, the processing can be realized by a personal computer (PC) 6 connected via an IEEE1394 interface. At this time, by transferring data via the IEEE 1394 interface, it is possible to hold data in the PC 6 and decode data. At this time,
There is no need to incorporate a digital CS broadcast receiving system into the PC 6;
Data can be received. As described above, by interconnecting digital AV equipment having a digital interface represented by IEEE 1394, a digital AV system capable of processing digital data that cannot be signal-processed such as decoding by the AV equipment alone can be processed as a whole system. Can be built. According to the present invention, by interconnecting a plurality of digital AV equipment, connection interface capable of transmitting and receiving digital data having the processing functions of the individual digital data, specific For digital data that cannot be processed by AV equipment, other A
By transferring digital data to a V device and processing it with another AV device, a plurality of format data or services can be processed as a whole system, and it is possible to construct a system that avoids duplication of processing functions. Also , a plurality of digital AV devices are connected by a digital interface so that digital data can be transmitted and received between each other, and digital data that cannot be processed by the own AV device is transferred to another device and processed. Digital data can be processed as a system. [0025] [0026], collectively enables handling processing of the digital data of multiple formats as a whole system, without being aware of the individual AV apparatus, it is possible to handle a variety of digital data.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a digital AV system according to the present invention. FIG. 2 shows a first embodiment of the digital AV system.
FIG. 3 is a block diagram when a digital CS receiver receives different format data. FIG. 3 is a block diagram when a digital CATV receiver receives upper layer data of the same format in the embodiment of the digital AV system. FIG. 4 shows a first embodiment of the digital AV system.
FIG. 3 is a block diagram when the digital CS receiver of FIG. 1 receives digital data other than AV data. [Description of Signs] 1 ... Digital CATV receiver, 1a ... Cable, 2 ... Digital BS receiver, 2a ... BS antenna, 3 ... First digital CS receiver, 3a ... CS antenna, 4 ... Second digital CS Receiver, 4a ... CS antenna, 5 ... Monitor,
6 personal computer (PC), 7 mini disk recorder / player (MD), 8 DVD player,
9 ... Digital video camera.

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Claims (1)

(57) a plurality of AV devices having [claimed is: 1. A different digital data processing functions, respectively, are connected to each other digital data via a transceiver capable connection interface, the plurality of AV At least one AV device of the device is
The digital data processing function of the plurality of AV devices
For digital data that can not be processed by a specific AV device.
The other AV device that can process the digital data
Search and select AV equipment based on the function table
On the, transmitted to the other AV device selected, the digital data by processing said other AV devices that has received the mutual transmission receivable digital AV system data enabling the processing system as a whole in, comprising a receiving device for digital broadcasting as the AV equipment, a
Including digital data of data broadcasting different from V data
Received digital data is data that can be processed by
Digital data and digital data that can be processed by the other AV equipment
Digital data that can be separated into data and processed by the other AV equipment
Search and search for the other AV device to process
Select the digital interface via the connection interface
Other than transmitting digital data and receiving the digital data.
That the AV device performs decoding processing of the digital data
Digital AV system capable of mutually transmitting and receiving data
Stem .