Video receiving terminal, home gateway device, quality management system, and quality deterioration isolation system
AssigneeMitsubishi Electric Corporation
InventorsHiroshi Honda, Shinji Maeda, Shin Miura
Life of this patent
Estimating the term…
Abstract
A pre-FEC packet quality analyzer 310 measures quality information from a video stream which is not yet stored in a buffer 303 and on which a recovery process using FEC is not yet carried out. A post-FEC packet quality analyzer 308 measures quality information from the video stream which is stored in the buffer 303 and on which the recovery process using FEC is carried out. A video receiving terminal profile transmitter 307 generates a video receiving terminal profile including at least information showing the size of the buffer 303, and transmits the video receiving terminal profile to a home gateway device.
Claims25
A video receiving terminal connected to a best-effort network and using a service of carrying out video communications in real time, said video receiving terminal comprising:
- a pre-FEC packet quality analyzer that measures quality information from a video stream which is not yet stored in a buffer used for absorbing packet delay fluctuations in a video stream and on which a recovery process using FEC is not yet carried out;
- a post-FEC packet quality analyzer that measures quality information from a video stream which is stored in said buffer and on which the recovery process using FEC is carried out;
- a quality information transmitter that transmits said pieces of measured quality information;
- and
- a video receiving terminal profile transmitter that generates a video receiving terminal profile including at least information showing a size of said buffer, and transmits the video receiving terminal profile.
A home gateway device connected to a best-effort network and using a service of carrying out video communications in real time, said home gateway comprising:
- a video receiving terminal acquiring unit that acquires a video receiving terminal profile of a video receiving terminal that receives a video stream delivered via said home gateway device, said video receiving terminal profile including at least information showing a size of a buffer for absorbing packet delay fluctuations of said video stream;
- a pre-FEC packet quality analyzer that measures quality information from said video stream by using said video receiving terminal profile;
- and
- a quality information transmitter that transmits the quality information measured by said pre-FEC packet quality analyzer.
A quality management system connected to a best-effort network and using a service of carrying out video communications in real time, said quality management system comprising:
- a quality information classifier that classifies quality information of a video stream, the quality information being generated by using a video receiving terminal profile of a video receiving terminal that receives said video stream and said video receiving terminal profile including at least information showing a size of a buffer for absorbing packet delay fluctuations of said video stream, and that stores said quality information in a quality information database;
- a quality information acquiring unit that acquires said quality information from said quality information database;
- and
- a quality deterioration determinator that isolates a quality deterioration on a basis of said acquired quality information.
A quality deterioration isolation system connected to a best-effort network and using a service of carrying out video communications in real time, said quality deterioration isolation system comprising:
- a video receiving terminal that receives a video stream via a home gateway device, and also generates a video receiving terminal profile used for generating quality information of said video stream;
- the home gateway device that generates quality information of said video stream by using said video receiving terminal profile;
- and
- a quality management system that isolates a quality deterioration of the video stream by using each of said pieces of quality information,
- wherein said video receiving terminal profile includes at least information showing a size of a buffer for absorbing packet delay fluctuations of the video stream in said video receiving terminal, said video receiving terminal includes a pre-FEC packet quality analyzer that measures quality information from the video stream which is not yet stored in the buffer and on which a recovery process using FEC is not yet carried out, a post-FEC packet quality analyzer that measures quality information from the video stream which is stored in the buffer and on which the recovery process using FEC is carried out, a quality information transmitter that transmits said pieces of measured quality information to a quality management system, and a video receiving terminal profile transmitter that generates said video receiving terminal profile and transmits said video receiving terminal profile to the home gateway device, said home gateway device includes a video receiving terminal acquiring unit that receives the video receiving terminal profile transmitted by the video receiving terminal, a pre-FEC packet quality analyzer that measures quality information from the video stream, and a quality information transmitter that transmits the quality information measured by said pre-FEC packet quality analyzer to the quality management system, and said quality management system includes a quality information classifier that classifies the quality information transmitted thereto and stores this quality information in a quality information database, a quality information acquiring unit that acquires said quality information from said quality information database, and a quality deterioration determinator that isolates a quality deterioration on a basis of said acquired quality information.
A video receiving terminal connected to a best-effort network and using a service of carrying out video communications in real time, said video receiving terminal comprising:
- a video receiving terminal profile transmitter that generates a video receiving terminal profile showing information specific to said video receiving terminal, and also transmits said video receiving terminal profile to a home gateway device that delivers said a video stream;
- an FEC processor that carries out a recovery process using FEC on the video stream including a dummy packet which is generated on a basis of said video receiving terminal profile by said home gateway device, and also adds information including at least a result of said recovery process to said video stream;
- a quality analyzer that measures quality information from the video stream to which said information is added;
- and
- a quality information transmitter that transmits the measured quality information.
A home gateway device connected to a best-effort network and using a service of carrying out video communications in real time, said home gateway comprising:
- a video receiving terminal acquiring unit that acquires a video receiving terminal profile which is information specific to a video receiving terminal that receives a video stream delivered via said home gateway device;
- and
- a dummy packet transmitter that judges the video stream on a basis of said video receiving terminal profile, and transmits a dummy packet including information identifying where in the video stream caught by the home gateway device a packet loss has occurred to said video receiving terminal.
A quality deterioration isolation system connected to a best-effort network and using a service of carrying out video communications in real time, said quality deterioration isolation system comprising:
- a video receiving terminal that receives a video stream via a home gateway device, and also generates a video receiving terminal profile which is information specific to said video receiving terminal;
- a home gateway device that generates a dummy packet by using said video receiving terminal profile, and transmits the dummy packet to said video receiving terminal;
- and
- a quality management system that isolates a quality deterioration of the video stream by using said quality information, wherein
- said video receiving terminal includes an FEC processor that carries out a recovery process using FEC on the video stream including said dummy packet, and also adds information including at least a result of said recovery process to said video stream, a quality analyzer that measures quality information from the video stream to which said information is added, a quality information transmitter that transmits the measured quality information to a quality management system, and a video receiving terminal profile transmitter that generates said video receiving terminal profile and transmits said video receiving terminal profile to the home gateway device, said home gateway device includes a video receiving terminal acquiring unit that receives said video receiving terminal profile transmitted by said video receiving terminal, and a dummy packet transmitter that judges the video stream on a basis of said video receiving terminal profile, and transmits the dummy packet to said video receiving terminal, and said quality management system includes a quality information classifier that classifies the quality information transmitted thereto and stores the quality information in a quality information database, a quality information acquiring unit that acquires said quality information from said quality information database, and a quality deterioration determinator that isolates a quality deterioration on a basis of said acquired quality information.
A video receiving terminal connected to a best-effort network and using a service of carrying out video communications in real time, said video receiving terminal comprising:
- a pre-FEC packet quality analyzer that measures quality information from a video stream which is not yet stored in a buffer used for absorbing packet delay fluctuations in the video stream and on which a recovery process using FEC is not yet carried out, and also adds information generated from a time at a time when receiving a packet to said quality information in order to determine in which section in the video stream said quality information has been measured;
- and
- a quality information transmitter that transmits said quality information.
A video receiving terminal connected to a best-effort network and using a service of carrying out video communications in real time, said video receiving terminal comprising:
- a post-FEC packet quality analyzer that measures quality information from a video stream which is stored in a buffer used for absorbing packet delay fluctuations in the video stream and on which a recovery process using FEC is carried out, and also adds information generated from a time at a time when receiving a packet to said quality information in order to determine in which section in the video stream said quality information has been measured;
- and
- a quality information transmitter that transmits said quality information.
A home gateway device connected to a best-effort network and using a service of carrying out video communications in real time, said home gateway comprising:
- a pre-FEC packet quality analyzer that measures quality information of a packet to be transferred, and also adds information generated from a time at a time when receiving a packet to said quality information in order to determine in which section in the video stream said quality information has been measured;
- and
- a quality information transmitter that transmits the quality information measured by said pre-FEC packet quality analyzer.
A quality management system connected to a best-effort network and using a service of carrying out video communications in real time, said quality management system comprising:
- a quality information classifier that, on a basis of information generated from a time at a time of receiving a packet, the time being added to quality information received from at least either one of a video receiving terminal that receives a video stream and a home gateway device that transfers said video stream, classifies the quality information of said video stream and stores the quality information in a quality information database;
- a quality information acquiring unit that acquires said quality information on a basis of said quality information database;
- and
- a quality deterioration determinator that isolates a quality deterioration from said acquired quality information.
Dependencies are inferred from the claim text.