A method is provided for delivering targeted advertisements into a QAM or IP stream that provides accurate synchronization. The method includes synchronizing the internal content of a IP stream delivering video with an advertisement (ad) stream by providing content information in the IP stream and the network stream, the content information including positional information and/or referential information, wherein the positional information is inserted at key locations identified with a PTS value, and wherein the referential information refers to a position in the IP stream or the ad stream, the referential information including either a PTS value or a frame count.

A video encoding method includes deriving entry point information specifying an entry point of a substream for a picture. The entry point information may include a number syntax element representing a number of offset syntax elements in a slice header; an offset syntax element representing an entry point offset between in bytes two entry points; and a length syntax element representing a bits length of the offset syntax element. A value of the length syntax element plus one corresponds to the bits length of the offset syntax element and the length syntax element is signaled when the number of the offset syntax elements is larger than 0. A value of the number syntax element corresponds to the number of offset syntax elements in the slice header, and the offset syntax element is signaled when the number of the offset syntax elements is larger than 0.

A video encoding method includes deriving entry point information specifying an entry point of a substream for a picture. The entry point information may include a number syntax element representing a number of offset syntax elements in a slice header; an offset syntax element representing an entry point offset between in bytes two entry points; and a length syntax element representing a bits length of the offset syntax element. A value of the length syntax element plus one corresponds to the bits length of the offset syntax element and the length syntax element is signaled when the number of the offset syntax elements is larger than 0. A value of the number syntax element corresponds to the number of offset syntax elements in the slice header, and the offset syntax element is signaled when the number of the offset syntax elements is larger than 0.

A data processing method of a multimedia device is disclosed. The multimedia device pauses playback of multimedia data in response to a pause signal. The method includes: buffering the multimedia data before the pause signal is received to obtain prerecorded multimedia data; writing the prerecorded multimedia data into a storage unit in response to the pause signal; reading the prerecorded multimedia data from the storage unit in response to a playback signal; and playing the prerecorded multimedia data.

A data processing method of a multimedia device is disclosed. The multimedia device pauses playback of multimedia data in response to a pause signal. The method includes: buffering the multimedia data before the pause signal is received to obtain prerecorded multimedia data; writing the prerecorded multimedia data into a storage unit in response to the pause signal; reading the prerecorded multimedia data from the storage unit in response to a playback signal; and playing the prerecorded multimedia data.

An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: determining at least a first signal and an associated second signal; storing the first signal in a first file; generating in the first file and associated with the first signal a reference pointer to a location; and storing at the location indicated by the reference pointer the second signal associated with the first signal.

An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: determining at least a first signal and an associated second signal; storing the first signal in a first file; generating in the first file and associated with the first signal a reference pointer to a location; and storing at the location indicated by the reference pointer the second signal associated with the first signal.

Systems and methods of a media device are operable to perform a channel change operation. An exemplary embodiment receives a first data table from a data table server, wherein the first data table comprises first control information used to perform a channel change operation such that the media device reconfigures itself to change to a new channel from a currently presenting channel or to a new media content event from a currently presenting media content event. The exemplary embodiment later receives a second data table after initiation of the channel change operation, wherein the second data table is broadcast to the media device in one of a plurality of received broadcasting media content streams that has the new media content event, and wherein the second data table comprises second control information that corresponds to at least some of the first control information used to perform the channel change operation.

Systems and methods of a media device are operable to perform a channel change operation. An exemplary embodiment receives a first data table from a data table server, wherein the first data table comprises first control information used to perform a channel change operation such that the media device reconfigures itself to change to a new channel from a currently presenting channel or to a new media content event from a currently presenting media content event. The exemplary embodiment later receives a second data table after initiation of the channel change operation, wherein the second data table is broadcast to the media device in one of a plurality of received broadcasting media content streams that has the new media content event, and wherein the second data table comprises second control information that corresponds to at least some of the first control information used to perform the channel change operation.

A method of decoding a coded video bitstream implemented by a video decoder is provided. The method includes the video decoder determining whether a value for a first flag is provided by an external input; setting a first flag equal to the value provided by the external input and a second flag equal to the value of the first flag to prevent a gradual decoding refresh (GDR) picture from being output when the value for the first flag is provided by the external input; decoding the GDR picture; and storing the GDR picture in a decoded picture buffer (DPB).