Method and system for retransmitting internet protocol packet for terrestrial digital multimedia broadcasting service
AssigneeSamsung Electronics Co., Ltd.
InventorsSung-Kee Kim, Do-In Choi, Yong-Gyoo Kim, Yun-Je Oh, Seong-Taek Hwang
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Abstract
A system and method for retransmitting an Internet protocol packet for terrestrial digital multimedia broadcasting (DMB) service are provided, in which a PES packetizer and an MPEG-2 TS multiplexer are removed; video, audio, and data signals are individually carried by RTP packets; and a receiver extracts object clock reference (OCR) included in a MPEG-4 SL, and synchronizes a system clock and controls buffers by means of the OCR.
Claims10
A system for retransmitting an Internet protocol packet for terrestrial digital multimedia broadcasting (DMB) service, the system comprising:
- a transmitting apparatus for:
- encoding video, audio, and data information according to an MPEG-4 scheme,
- individually encapsulating the encoded information into corresponding MPEG-4 synchronization layers (SL), and
- individually carrying the encapsulated video, audio, and data information, together with Program Specific Information (PSI), by packets of an RTP/RTCP (Real-Time Transport Protocol/Real-Time Transport Control Protocol) scheme, wherein a single object clock reference information (OCR) is added to one of the video, audio, and data information to be transmitted;
- and
- a receiving apparatus for receiving each of the packets from the transmitting apparatus, and performing a decapsulation based on the RTP/RTCP scheme, an MPEG-4 SL decapsulation and a decoding with respect to each received packet, thereby restoring the original video, audio, and data information for the DMB service extracting the OCR information and using the OCR information for synchronization of a system clock and for control of a buffer containing corresponding data.
A method for retransmitting an Internet protocol packet for terrestrial digital multimedia broadcasting (DMB) service, the method comprising:
- individually encoding, by a transmitting apparatus, video, audio, and data information according to an MPEG-4 scheme, individually encapsulating the encoded video, audio and data information into corresponding MPEG-4 synchronization layers (SL), and individually transmitting each of the encapsulated video, audio and data information, together with Program Specific Information (PSI), by packets of an RTP/RTCP (Real-Time Transport Protocol/Real-Time Transport Control Protocol) scheme wherein a single object clock reference information (OCR) is added to one of the video, audio, and data information to be transmitted;
- and
- decapsulating, by a receiving apparatus, each packet received from the transmitting apparatus according to the RTP/RTCP scheme, and performing an MPEG-4 SL decapsulation and a decoding with respect to each packet decapsulated according to the RTP/RTCP scheme, thereby restoring the original video, audio, and data information for the DMB service by extracting the OCR information and using the OCR information for synchronization of a system clock and for control of a buffer containing corresponding data.
An apparatus for retransmitting an Internet protocol packet for terrestrial digital multimedia broadcasting (DMB) service, comprising:
- an encoder encoding video, audio, and data information according to an MPEG-4 scheme;
- an encapsulator individually encapsulating each of the encoded information into corresponding MPEG-4 synchronization layers (SL) packet;
- a RTP/RTCP packetizer individually packetizing each of the encapsulated packet and individually carrying the encapsulated packet, together with Program Specific Information (PSI), according to RTP/RTCP (Real-Time Transport Protocol/Real-Time Transport Control Protocol) scheme;
- and
- a UDP/IP packetizer coupled to an output of the RTP/RTCP packetizer generating a video IP stream, an audio IP stream, a data IP stream, and PSI IP stream, wherein a single object clock reference information (OCR) is added to one of the video, audio, and data information to be transmitted information, the OCR being used to provide synchronization with a receiving device.
Dependencies are inferred from the claim text.