Digital data transmitting apparatus, digital data receiving apparatus, and digital data communication apparatus

• US 20040136408A1
• Filed: 05/29/2003
• Published: 07/15/2004
• Est. Priority Date: 01/15/2003
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Tomobe, Osamu, Ishida, Takaharu
• Application Number:
  US10/447,145
• Publication Number:
  US 20040136408A1
• Time in Patent Office: Days
• US Class Current: 370/532
• CPC Class Codes: H04H 20/16 Arrangements for broadcast or for distribution of identical information repeatedly
• CPC Class Codes: H04H 20/28 Arrangements for simultaneous broadcast of plural pieces of information
• CPC Class Codes: H04H 20/59 for emergency or urgency
• CPC Class Codes: H04H 60/06 Arrangements for scheduling broadcast services or broadcast-related services
• CPC Class Codes: H04J 3/1605 Fixed allocated frame structures
• CPC Class Codes: H04L 47/24 Traffic characterised by specific attributes, e.g. priority or QoS
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• CPC Class Codes: H04N 21/2362 Generation or processing of Service Information [SI]
• CPC Class Codes: H04N 21/26216 involving the channel capacity, e.g. network bandwidth admission control, resource allocation in open networks H04L12/5692; flow control in packet networks H04L47/10; establishing a schedule or organising the servicing of application requests taking into account QoS H04L67/61
• CPC Class Codes: H04N 21/26233 involving content or additional data duration or size, e.g. length of a movie, size of an executable file
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/4882 for displaying messages, e.g. warnings, reminders arrangements for providing short real-time information to substation in data switching networks H04L12/1895
• CPC Class Codes: H04N 21/8126 involving additional data, e.g. news, sports, stocks, weather forecasts
• CPC Class Codes: H04N 21/814 comprising emergency warnings arrangements specially adapted for emergency or urgency in broadcast systems H04H20/59; arrangements for providing alarms, notifications, alerts to substation in data switching networks H04L12/1895
• CPC Class Codes: H04N 21/8146 involving graphical data, e.g. 3D object, 2D graphics

Abstract

In order to effectively use a band and securely transmit emergency information such as information of disasters because such information needs to be securely provided to a user most preferentially via a digital broadcasting receiver held by the user even when the user is outside, digital data is multiplexed on the basis of transmission volume of the digital data, and data type, priority and data effective time as attributes of the digital data, and the multiplexed digital data is transmitted.

Claims

1. A digital data transmitting apparatus having a data type setting unit, a priority setting unit, and a data effective time setting unit, the digital data transmitting apparatus comprising:

a data size measuring unit for measuring a transmission volume of the digital data;

a data multiplexing unit for multiplexing the digital data on the basis of the transmission volume, and data type, priority, and data effective time, which are attributes of the digital data set by the setting units, and

a transmitting unit for transmitting the multiplexed data.

2. The digital data transmitting apparatus as claimed in claim 1, further comprising:

a transmission time providing unit for setting a transmission time on the basis of the data effective time; and

a packet generating unit for packetizing the digital data when transmitting the digital data;

wherein the transmission time providing unit provides a time to the packet.

3. The digital data transmitting apparatus as claimed in claim 2, wherein the packet generating unit has plural hierarchical levels for generating a packet and generates a packet after adding a header to each hierarchical level, and

the transmission time providing unit provides a transmission time to a packet of a header added to the lowermost hierarchical level for packet generation.

4. The digital data transmitting apparatus as claimed in claim 1, further comprising an emergency information identifier providing unit for providing an emergency information identifier to digital data to be transmitted when the digital data is emergency information.

5. The digital data transmitting apparatus as claimed in claim 4, wherein the digital data which is emergency information includes information of the content of the emergency information, date and time of occurrence of the emergency information, and the place of the emergency information.

6. The digital data transmitting apparatus as claimed in claim 1, further comprising a multiplexed display unit for displaying the multiplexed content.

7. A digital data receiving apparatus for receiving digital data multiplexed on the basis of a data transmission volume of a digital data transmitting apparatus, and the data type of the digital data, the priority of the digital data, and the effective time of the digital data, the digital data receiving apparatus comprising:

a received data storing unit for storing the received digital data;

a received data storing buffer size deciding unit for deciding a size of a received data storing buffer;

a demultiplexing unit for demultiplexing the multiplexed data; and

a demultiplexed data storing unit for storing the demultiplexed data.

8. The digital data receiving apparatus as claimed in claim 7, wherein when the digital data is emergency information, the digital data has an emergency information identifier,

the digital data receiving apparatus further comprising:

an emergency information identifying unit for identifying the emergency information identifier;

an emergency information storing unit for storing the emergency information;

an emergency information display unit for displaying the emergency information;

a main broadcast display control unit for deciding whether to keep or stop display of a main broadcast when displaying the emergency information;

a main broadcast storing unit for storing the main broadcast when receiving the emergency information; and

a main broadcast reproducing unit for reproducing the stored main broadcast.

9. The digital data receiving apparatus as claimed in claim 8, further comprising:

a electronic map display unit for displaying an electronic map;

a latitude/longitude acquiring unit for acquiring latitude/longitude information of the receiving apparatus;

an emergency position information analyzing unit for analyzing position information inserted in the emergency information; and

a refuge acquiring unit for acquiring a refuge.

10. The digital data receiving apparatus as claimed in claim 9, wherein the refuge acquiring unit comprises:

a refuge storing unit for storing a list of refuges; and

a refuge guide unit for guiding to an optimum refuge using refuge information acquired from the refuge storing unit, information acquired by the latitude/longitude acquiring unit of the receiving apparatus, and emergency position information in the emergency information.

11. A digital data communication apparatus for transmitting and receiving digital data multiplexed on the basis of a data transmission volume of a digital data transmitting apparatus, and the data type of the digital data, the priority of the digital data, and the effective time of the digital data, the digital data communication apparatus comprising:

a data type setting function;

a priority setting function;

a data effective time setting function;

a data size measuring function for measuring the transmission volume of the digital data;

a data multiplexing function for multiplexing the digital data on the basis of the transmission volume, and the data type, priority, and data effective time, which are attributes of the digital data set by the setting functions; and

a transmitting function for transmitting the multiplexed data; and

a received data storing function for storing received digital data;

a received data storing buffer size deciding function for deciding a size of a received data storing buffer;

a demultiplexing function for demultiplexing multiplexed data; and

a demultiplexed data storing function for storing the demultiplexed data.