Method and device for providing mosaic channel

1. A method for providing a mosaic view among multiple client devices, wherein at the side of a client device, the method comprises:

receiving an instruction for changing to the mosaic view;

receiving channel information of at least one channel program received by one or more other client devices, via a data communication network, through which all client devices are connected, wherein channel information of each channel program is received via IP layer multicast and for each channel program among the at least one channel program that is being received by at least two client devices, selecting only one client device from the at least two client devices as a representative client device to send channel information of the channel program via IP layer multicast; and

generating, at the client device, the mosaic view that comprises mosaic cells received from different representative client devices as a low resolution stream for presenting the channel information wherein the channel information is a picture or multiple pictures captured by a client device sending the channel information from the channel program the client device is receiving.

2. The method of claim 1 , wherein the multiple client devices are grouped into multiple groups, wherein the client device changing to the mosaic view only receives channel information from client devices of its group.

3. The method of claim 1 , wherein the channel programs are grouped into multiple channel groups, and each channel group corresponds to a mosaic view, wherein, the client device changing to the mosaic view corresponding to a channel group receives channel information from client devices receiving channel programs of the channel group.

4. The method of claim 1 , further comprising when the client device is receiving a channel program via the communication network, sending, by the client device, channel information of the channel program via the data communication network.

5. The method of claim 1 , wherein the channel information is a low resolution stream that is converted, by a client device sending the channel information, from the channel program the client device is receiving.

6. The method of claim 1 , wherein the mosaic view is provided in a channel.

7. A client device for providing a mosaic view, wherein the client device is connected via a data communication network to multiple client devices so as to communicate data with them, the client device comprises:

a first interface configured to receive at least one channel program from at least one channel program server;

a second interface configured to connect to the data communication network; and

a processor configured to receive channel information of the at least one channel program from at least one of the multiple client devices via the second interface, and generate, at the client device, the mosaic view including mosaic cells received from different representative client devices for presenting the channel information, wherein channel information of each channel program is received via IP layer multicast and, for each channel program among the at least one channel program that is being received by at least two client devices, select only one client device from the at least two client devices as a representative client device to send channel information of the channel program via IP layer multicast; and

a convertor configured to convert the channel program into a low resolution stream, or capture a picture or multiple pictures from the channel program, and the processor is further configured to send the low resolution stream, captured picture or captured multiple pictures via the second interface.