Audio/visual data communication system, audio/visual data transmitting device, and audio/visual data reproducing device

• US 7,885,716 B2
• Filed: 09/02/2005
• Issued: 02/08/2011
• Est. Priority Date: 09/02/2004
• Status: Active Grant

• Current Assignee: Mitsubishi Materials Corporation
• Original Assignee: Mitsubishi Materials Corporation
• Inventors: Yamashita, Nobuyuki, Nakamura, Kenzo, Tari, Kazuyoshi
• Primary Examiner(s): Vu; Thong H
• Application Number:
  US11/574,549
• Publication Number:
  US 20070293955A1
• Time in Patent Office: 1,985 Days
• Field of Search: 370/485, 370/503, 370/395, 709/238, 709/228, 340/310, 340/425
• US Class Current: 700/28
• CPC Class Codes: H04B 2203/545 Audio/video application, e.g. interphone
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines

Abstract

The present invention provides an audio/visual data communication system including an audio/visual data reproducing device capable of changing the type of data to be transmitted. Further, the present invention provides an audio/visual data transmitting device and an audio/visual data reproducing device forming the audio/visual data communication system. An audio data reproducing speaker 3 includes an instruction input unit 33 that inputs an instruction to change data transmitted from an audio data transmitting device, a message generating unit 32 that generates a message for requesting to change data on the basis of the instruction, and a message transmitting unit 31 that transmits the message. The audio data transmitting device includes a message receiving unit that receives the message transmitted from the message transmitting unit 31, a data setting unit that sets data on the basis of the message, a data generating unit that generates transmission data on the basis of the data set by the data setting unit, and a data transmitting unit that transmits the transmission data.

Claims

1. An audio/visual data communication system comprising:

an audio/visual data transmitting device that transmits data through a power line; and

an audio/visual data reproducing device that receives the data and reproduces the data,

wherein the audio/visual data reproducing device includes;

an instruction input unit that inputs an instruction to change the data received from the audio/visual data transmitting device;

a message generating unit that generates a message for requesting to change the data transmitted from the audio/visual data transmitted device on the basis of the instruction input through the instruction input unit; and

a message transmitting unit that transmits the message generated by the message generating unit to the audio/visual data transmitting device, and

the audio/visual data transmitting device includes;

a message receiving unit that receives the message transmitted from the message transmitting unit;

a data setting unit that sets data to be transmitted to the audio/visual data reproducing device on the basis of the message received by the message receiving unit;

a data generating unit that generates transmission data to be transmitted to the audio/visual data reproducing device on the basis of the data set by the data setting unit; and

a data transmitting unit that transmits the transmission data generated by the data generating unit to the audio/visual data reproducing device.

2. The audio/visual data communication system according to claim 1,

wherein the audio/visual data transmitting device further includes a first group ID storage unit that stores group IDs for identifying the same audio/visual data,

the audio/visual data reproducing device further includes a second group ID storage unit that stores the group IDs,

the data generating unit generates the transmission data having the group ID stored in the first group ID storage unit, and

the audio/visual data reproducing device receives data when the group ID included in the transmission data transmitted from the data transmitting unit is identical with the group ID stored in the second group ID storage unit.

3. The audio/visual data communication system according to claim 2,

wherein the audio/visual data reproducing devices are arranged in a plurality of rooms, and

the group IDs stored in the second group ID storage unit are allocated to the rooms according to the purpose of usage of the rooms.

4. An audio/visual data transmitting device that transmits data to an audio/visual data reproducing device through a power line, comprising:

a data storage unit that stores unique IDs allocated to the audio/video reproducing devices, group IDs for identifying the same audio/visual data, and audio/visual data;

a message receiving unit that receives a message for requesting to change data to be transmitted to the audio/visual data reproducing device;

a data setting unit that sets the data to be transmitted to the audio/visual data reproducing device on the basis of the message received by the message receiving unit;

a data generating unit that generates transmission data on the basis of the data stored in the data storage unit and the data set by the data setting unit; and

a data transmitting unit that transmits the transmission data generated by the data generating unit to the audio/visual data reproducing device through the power line.

5. The audio/visual data transmitting device according to claim 4,

wherein the data setting unit sets the volume of the audio/visual data, the type of the audio/visual data, or a change of the audio/visual data transmitting device, which is a source of the audio/visual data.

6. An audio/visual data reproducing device that receives data from an audio/visual data transmitting device through a power line, comprising:

a data storage unit that stores unique IDs allocated to the audio/visual data reproducing devices and group IDs for identifying the same audio/visual data;

a data receiving unit that determines whether to receive data transmitted from the audio/visual data transmitting device through the power line on the basis of the data stored in the data storage unit;

an audio/visual data reproducing unit that reproduces the data received by the data receiving unit;

an instruction input unit that inputs an instruction to change data reproduced by the audio/visual data reproducing device;

a message generating unit that generates a message for requesting to change data to be transmitted to the audio/visual data transmitting device on the basis of the instruction input through the instruction input unit; and

a message transmitting unit that transmits the message generated by the message generating unit to the audio/visual data transmitting device through the power line.