US 7,681,244 B2Granted

Packet transmitter apparatus

AssigneePanasonic Corporation

InventorsYoshihiro Morioka, Yasushi Ayaki, Naoshi Usuki

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Abstract

To provide a packet transmitter apparatus which can transmit contents protected by a content protection technique such as DTCP or the like, using packets such as IP packets which have become widespread. The packet transmitter apparatus includes a transmitting condition setting management unit (404) which extracts at least one of charge information, playback control information and copy control information of AV data from the inputted non-AV data or AV data and generates, based on the extracted information, encryption mode information indicating an encryption mode which becomes a condition at the time of transmitting the AV data; an encrypted data generation unit (406) which generates encrypted data by encrypting, based on the transmitting condition, the inputted AV data and adding encryption information headers based on the encryption mode information to the encrypted AV data; and a packet generation unit (403) which generates packets by adding packet headers to the generated encrypted data. The transmitting condition is to be determined as a combination of input terminal information, data format information and attribute information.

Claims42

Dependent claims

A packet transmitter apparatus which transmits packet data to a packet receiver apparatus, said transmitter apparatus comprising:

an audio and video (AV) data information obtainment unit operable to obtain AV data information including:
input terminal information indicating a terminal to which AV data is inputted;
data format information indicating a data format of the AV data;
and attribute information indicating an attribute of the AV data;
a data input unit operable to receive the AV data and non-AV data;
a transmitting condition setting management unit operable to extract at least one of charge information, playback control information and copy control information of the AV data, from the non-AV data or the AV data, and generate, based on the extracted information, encryption mode information indicating an encryption mode which serves as a condition at the time when the AV data is transmitted;
an encrypted data generation unit operable to generate encrypted data by encrypting, based on transmitting conditions, the AV data received by said data input unit, and adding encryption information headers based on the encryption mode information to the encrypted AV data, the transmitting conditions being determined as a combination of the input terminal information, the data format information and the attribute information;
a packet generation unit operable to generate packets by adding packet headers to the encrypted data generated by said encrypted data generation unit;
an authentication unit operable to perform authentication processing for encryption or decryption of the AV data with the packet receiver apparatus using Uniform Resource Identifier (URI) information indicating an access position of the AV data in the packet transmitter apparatus or extended URI information;
a transmission protocol determination unit operable to determine a transmission protocol of the AV data between said packet transmitter apparatus and said packet receiver apparatus, using at least one of the input terminal information, the attribute information and information indicating a transmission mode specified by said packet receiver apparatus;
and
a transmission unit operable to transmit the packets including the encrypted data generated by said packet generation unit to said packet receiver apparatus according to the transmission protocol determined by said transmission protocol determination unit, after the authentication processing with said packet receiver apparatus is completed,
wherein said packet generation unit is operable to generate the packets according to one of HyperText Transfer Protocol (HTTP), TCP and Internet Protocol (IP).

10 more elements

A packet transmitting method of transmitting packet data from a packet transmitter apparatus to a packet receiver apparatus, said method comprising:

an AV data information obtainment step of obtaining AV data including input terminal information indicating a terminal to which the AV data is inputted, data format information indicating data format of the AV data, and attribute information indicating an attribute of the AV data;
a data input step of receiving the AV data and non-AV data;
a transmitting condition setting management step of extracting at least one of charge information, playback control information and copy control information of the AV data from the non-AV data or the AV data, and generating, based on the extracted information, encryption mode information indicating an encryption mode which becomes a condition at the time when the AV data is transmitted;
an encrypted data generation step of generating encrypted data by encrypting, based on transmitting conditions, the AV data received in said data input step, and adding encryption information headers based on the encryption mode information to the encrypted AV data, the transmitting conditions being determined as a combination of the input terminal information, the data format information and the attribute information;
a packet generation step of generating packets by adding packet headers to the encrypted data generated in said encrypted data generation step;
an authentication step of performing authentication processing for encryption or decryption of the AV data with the packet receiver apparatus using Uniform Resource Identifier (URI) information indicating an access position of the AV data in the packet transmitter apparatus or extended URI information;
a transmission protocol determination step of determining a transmission protocol of the AV data for transmission between the packet transmitter apparatus and the packet receiver apparatus, using at least one of the input terminal information, the attribute information and information indicating a transmission mode specified by the packet receiver apparatus;
and
a transmission step of transmitting packets including the encrypted data generated in said packet generation step to the packet receiver apparatus, according to the transmission protocol determined in said transmission protocol determination step, after the authentication processing with the packet receiver apparatus is completed,
wherein said packet generation step generates the packets according to one of HyperText Transfer Protocol (HTTP), TCP and Internet Protocol (IP).

7 more elements

A program, embodied on a computer-readable medium, intended for a packet transmitter apparatus which transmits packet data to a packet receiver apparatus, said program causing a computer to execute a packet transmission method which includes:

an AV data information obtainment step of obtaining AV data including input terminal information indicating a terminal to which the AV data is inputted, data format information indicating data format of the AV data, and attribute information indicating an attribute of the AV data;
a data input step of receiving the AV data and non-AV data;
a transmitting condition setting management step of extracting at least one of charge information, playback control information and copy control information of the AV data from the non-AV data or the AV data, and generating, based on the extracted information, encryption mode information indicating an encryption mode which becomes a condition at the time when the AV data is transmitted;
an encrypted data generation step of generating encrypted data by encrypting, based on transmitting conditions, the AV data received in the data input step, and adding encryption information headers based on the encryption mode information to the encrypted AV data, the transmitting conditions being determined as a combination of the input terminal information, the data format information and the attribute information;
a packet generation step of generating packets by adding packet headers to the encrypted data generated in the encrypted data generation step;
an authentication step of performing authentication processing for encryption or decryption of the AV data with the packet receiver apparatus using Uniform Resource Identifier (URI) information indicating an access position of the AV data in the packet transmitter apparatus or extended URI information;
a transmission protocol determination step of determining a transmission protocol of the AV data for transmission between the packet transmitter apparatus and the packet receiver apparatus, using at least one of the input terminal information, the attribute information and information indicating a transmission mode specified by the packet receiver apparatus;
and
a transmission step of transmitting packets including the encrypted data generated in the packet generation step to the packet receiver apparatus, according to the transmission protocol determined in the transmission protocol determination step, after the authentication processing with the packet receiver apparatus is completed,
wherein said packet generation step generates the packets according to one of HyperText Transfer Protocol (HTTP) TCP and Internet Protocol (IP).

7 more elements

Dependencies are inferred from the claim text.