Method and system for improvinQ the appearance of a person on the RTP stream coming from a media terminal
This invention relates to a method for replacing an input RTP stream coming from a media terminal by an output RTP stream integrating an environment which improves the appearance of a person on the input RTP stream, and a system enabling to carry out the said method.
People have to change clothes when going from a formal environment (such as work) to an environment of personal hobby or activity (biker's meeting, for example).
Indeed, as a look Is always public, everybody can see it. The problem is that social codes oblige people to a certain amount of conformity in their general appearance. Excessive clothing, tattoos or piercing are often regarded as unsuitable man'rfestation of personal taste or opinion. This statement is all the more true as regards religious symbols which can be forbidden in public.
Therefore, whereas people want to express themselves and show they are part of certain communities, they cannot always do it in public.
In some cases, some people might wish to keep private their belonging to a community and only show that belonging to the other members of that community.
Additionally, the number of different online worlds has strongly increased throughout the years. In those online worlds, people often create avatars which represent them in the game. That way, they have different identities and looks which they can change or switch. They can even simultaneously have several looks at once in different communities or applications.
Those avatars are a representation of the way their user would like to look but it can also be the only way by which the other members of a community (online

worlds, especially) know those users. Therefore, users can wish other members of the online world to see them with that appearance when they get to see each other, or any person of their choice to see them with another appearance that the user chooses. "
There is no system that currently enables people to control how otheiLpersQns__ will see them, i.e. that enables them to be dressed in a publicly accepted manner but to enable certain persons (such as other members of their community) to see them in a way they wish them to see them (for example, their avatar in the online world they both play in) thanks to the use of a media terminal such as a mobile phone.
The purpose of the invention is to resolve the problems of the prior art by proposing, in particular, a method for replacing an input RTP stream coming from a media terminal by an output RTP stream integrating an environment which improves the appearance of the person on the input RTP stream, and a system enabling to carry out the said method.
In the invention, a RTP stream (Real Time Protocol - IETF RFC3550) must be understood as a streaming protocol like RTP.
To this end, and according to a first aspect, the invention proposes a method to replace an input RTP stream coming from a media terminal by an output RTP stream integrating an environment which improves the appearance of a person on the input RTP stream in case of receipt of an input RTP stream, said method providing for:
- the identification of the media terminal user and of a person, at least one, who authorizes the said user to see himwith an improved appearance;
- if such persons exist, the identification of said person on the input RTP stream is made amongst the authorizing persons;
- the providing of data for the environment to be integrated in the input RTP stream of the identified user;

the integration in the input RTP stream of the data for the environment
which improves the appearance of the person on the said input RTP
stream;
the sending back of the output RTP stream thus obtained to the media
terminal.
According to a second aspect, the invention proposes a system for providing a near-real time augmented reality appearance in which an identified user uses a media terminal transmitting ain input RTP stream to a server through a network which identifies the media terminal user, said system comprising:
- a recognition module, said module being able to identify, in the input RTP stream, a person who authorizes the user to see him with an improved appearance, and to send the identification of the user and of the person to an environment module;
- an environment module, said module being able to determine the data for an environment to be integrated in the RTP stream, and to send the data for the environment to an integration module.
- an integration module, said module being able to integrate the environment in the input RTP stream and to send the said obtained RTP stream to the media terminal.
The invention will become apparent in the following description made with reference to the appended figure which represents an architecture of the system enabling to carry out the method according to an embodiment of the invention.
The media terminal G is a mobile phone used to make a video or a picture of another person.
In a broader embodiment, the media terminal can be a device built Into a person (e.g. Its eye or its brain) or other mechanisms like those for projection in a person's retina.

The media terminal user activates beforehand on his media terminal G the function enabling to replace the input RTP stream 1 by the output RTP stream 6. In order to activate that function, the media terminal user switches his mobile phone to "AR video" (Augmented Reality) mode. In another embodiment, the AR video mode can be automatically activated by a care taker, the government or another person/entity in order to force the replacement of the input RTP stream 1 by the output RTP stream 6.
The media terminal user then points the said terminal towards a person of its choice A, to make a video 1 by means of the media terminal G. The video is integrated in a Real Time Protocol (RTP) stream, and sent via the network 2 without being saved in the media terminal G.
Indeed, that RTP stream is directly sent by satellite transmission to a server B, the said server B saving the input RTP stream.
While transferring the input RTP stream to the server B, the network identifies the media temiinal user by its SIM data. Indeed, the related operator's enablers hold data concerning the media terminal users that they provide with their services. The said data is integrated in the SIM card of the media terminal.
If the network is not able to identify the owner of the media terminal via the data provided by the operator's enablers, the user must be able to identify itself on its media terminal.
The system identifies the person, at least one, who authorizes the said user to see him with an improved appearance. Indeed, the system comprises a recognition module C which receives the RTP stream and the identification of the media terminal user.
In a broader embodiment, a different face angle may result in different environment data, e.g. the input RTP stream may be replaced only when the person looks up in an angle of 10% above horizontal.

That module C is able to identify, in the input RTP stream, the person who authorizes the user to see him with an improved appearance.
To do so, the recognition module C uses the identification of the media terminal usetasearch-inJts database-consisting in alistrfor every media terminal user, of the persons who authorize the said user to receive an output RTP stream integrating an environment which improves their appearance.
Indeed, the persons wishing to be viewed on an output RTP stream with an improved appearance previously provide the recognition module C with:
- the data for the environment corresponding to their improved appearance,
- and the list of media terminal users who can see them with the said appearance.
If such persons exist, the identification of the person on the input RTP stream is made amongst the authorizing persons. That identification consists in facial recognition, based on pictures previously integrated in the module C.
In a broader embodiment, the identification of the person can be made by detection of its location compared to the media terminal's location. The said identification can also be made by detection of the distance between the person and the media terminal, of the orientation angle of the media terminal, and/or of the applied zoom of the media terminal.
In case of detection by the above listed means of the location of the person in the input RTP stream, the invention enables to improve in an identical way the appearance in the output RTP stream of all the persons within the detected location. That way, all those persons in that location may look alike.
In another broader embodiment, the identification of the person can be made:

by Identification of an element directly retrieved from the user, such as a worn symbol (e.g. a hanger) or a radio wave; - by any other means enabling to identify a person or a group of persons.
The recognition module C is also abl&:to identify parameters of the input RTP stream. Those parameters are, for-exampleHhe-person's head position and_. lighting conditions. Such parameters are identified in order to customize the data for the environment, such customized data being further integrated in the output RTP stream. Those parameters will enable to adequately and in a synchronized manner integrate the environment in the output RTP stream.
The identification of the user and of the person, along with the input RTP stream 3 are sent to an environment module D.
The environment module D is able to determine the data for the environment to be integrated in the RTP stream.
The system comprises the data for the person's recognized environment to be integrated in the input RTP stream of the identified user. Indeed, each person who authorizes media terminal users to see them with an improved appearance provides the system with the data for the environment corresponding to that augmented reality appearance.
The persons can choose that the data for the environment will differ from one media terminal user to another.
The persons can also decide that the data for the environment will change throughout time so that they can- have different improved, appearances in different time intervals.
That data for the environment is the real or virtual objects which will be integrated in the RTP stream. Thus, the environment integrated in the RTP

stream can be an object lil