Digital television playback and record method and device

Abstract

The invention provides a digital television playback and record method and device. The method comprises the following steps: a playback module or a record module sends a transport stream packet command with specified identification codes to a transport stream controller; the transport stream controller builds a virtual channel of a filter and simultaneously builds the mapping relation between the filter and the virtual channel; the transport stream controller sends the transport stream packet to the filter; and the virtual channel sends filtered data to the playback module or the record module. The device comprises a playback module, a record module and a transport stream controller, wherein the transport stream controller is provided with a filter and a driver module and used for building a virtual channel for a filter, building the mapping relation between the filter and the virtual channel and sending the transport stream packet to the filter capable of receiving the transport stream packet; and the filter is used for filtering the transport stream packet and sending data to the playback module or the record module through the virtual channel. According to the invention, the hardware resources of the playback and record device are reduced and the manufacturing cost is lowered.

Description

technical field [0001] The present invention relates to the field of digital TV data processing, in particular to a method and device for playing and recording digital TV. Background technique [0002] With the development and application of digital TV broadcasting technology, digital TV has entered thousands of households, such as handheld mobile TV, vehicle-mounted TV and home TV, etc., all widely use digital TV broadcasting technology. Digital TV technology can play and record digital TV signals, and the work of playing and recording can be carried out simultaneously. Both the playback and recording of data TV signals need to receive transport stream (transport stream) packets, but because the transport stream packets transmitted externally include video packets, audio packets, subtitle packets, etc., different types of transport stream packets use different identification codes (PID , Packet Identifier), so the digital TV playback and recording device needs to use a tra...

AI Technical Summary

Problems solved by technology

[0009] Since the structure of the transport stream controller 13 and the transport stream controller 17 are the same, the working principle of the filter is also the same. Receive transport stream packets from the same transport stream controller, if the playback module 11 and the recording module 12 both need to receive transport stream packets with the same identification code from the transport stream controller, then the transport stream controller will receive the transport stream packets with the same identification code The packet is sent to the same filter, but the filter cannot tell whether the received transport stream packet needs to be sent to the playback module 11 or the recording module 12, so that one of the playback module 11 and the recording module 12 will receive less data, which affects playback or recording. Recording work, can not achieve simultaneous playback and recording

[0010] Therefore, based on the above situation, the existing digital TV playback and recording device needs to be equipped with two transport stream controllers 13, 17 that work independently to meet the requirements of playback and recording respectively, resulting in higher production of digital TV playback and recording devices.

Moreover, the two transport stream controllers 13, 17 work independently, which also leads to a higher power of the digital TV playback and recording device, which consumes more electric energy, which is not conducive to saving energy.

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