CN101207749A - Apparatus and method for multi-picture dynamic condition displaying multi-path TV program contents - Google Patents
Apparatus and method for multi-picture dynamic condition displaying multi-path TV program contents Download PDFInfo
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Abstract
A device and a method for dynamically displaying the program content of a multi-channel television by a plurality of pictures carry out the dynamical display on the transmitting stream of a multi-channel video with different program sources; the device consists of a tuner 1 and a tuner 2, a selector 1 and a selector 2, a system decoder 1 and a system decoder 2, a message source decoder 1 and a message source decoder 2, a size convertor 1 and a size convertor 2, an aliasing device, an MCU and a buffer; the invention is characterized in that: by utilizing the economical technical means, the displaying modes of PIP and POP of a plurality of pictures of television programs can be realized by adopting the mode of double decoding, the image of Sprite can be displayed dynamically (accurately dynamical), so as to be convenient for the looker to know the playing process of the program on the Sprite in real time and to switch the key frame to the interested channel in time.
Description
Technical field
The present invention relates on a display interface, adopt in the apparatus of digital television receiving many pictures to show the apparatus and method of multi-channel video program source content simultaneously, especially adopt the apparatus and method of multi-picture dynamic condition displaying multi-path TV program contents.
Background technology
Along with enriching constantly of content of TV program, particularly live TV programme is more and more, different television channels can broadcast live program simultaneously, the beholder has the demand that the programme content of watching a television channel on same television set monitors other channel program content (incident) progress simultaneously, and increasing and the improving constantly of television articulation of video screen size makes the demand of beholder stronger.
In the simulated television epoch, the television set that can show a plurality of pictures, be referred to as picture-in-picture (PIP) or picture out picture (POP) has appearred, but shown picture great majority are two, and the most of hardware circuit in the television set needs two covers, with high costs, realize picture-in-picture (PIP) or a kind of especially extravagant hope of picture out picture (POP) more than two pictures.
Follow popularizing gradually of Digital Television, by means of video signal treatment technique, large scale integrated circuit continuous advancement in technology, realize the picture-in-picture (PIP) of many pictures or picture out picture (POP) more economically in apparatus of digital television receiving (digital TV set-top box or digital TV integrated machine), technology realizes that means are also abundanter.
Realize in the existing apparatus of digital television receiving that a kind of mode that many pictures show is that apparatus of digital television receiving is after start (powering on), utilize a cover tuner and a decoder, adopt the time-division mode be tuned to n different channels, and respectively n channel carried out the demodulation of digital television signal, decoding, last be tuned on the programs channel, and be shown as key frame and watch in real time for the beholder, other n-1 sprite can only show static picture, have only when the beholder switches to key frame with remote controller or panel button with some sprites, this picture could show moving image in real time in the position of key frame.Under present technical conditions, the mode that the many pictures of above-mentioned this realization digital television signal show is the means that generally adopt, but does not fundamentally solve the problem that the beholder understands programme content on the sprite (incident) process at any time.
U.S. Pat 6784945 has been introduced a kind of method that realizes the many pictures of Digital Television, this method has been introduced the method that adopts one or two tuner respectively the TV signal of key frame and sprite to be sampled, aspect the control of tuner, though propose to decode with the transport stream of two cover decoders after to channel demodulation, the concrete measure and the method that do not have proposition that the transport stream of the transport stream of key frame and sprite is decoded.
Summary of the invention
The objective of the invention is to get more and more the present situation that television screen is increasing at programme channel. a kind of apparatus and method of multi-picture dynamic condition displaying multi-path TV program contents are provided.
Technical scheme of the present invention is as follows:
A kind of apparatus and method of multi-picture dynamic condition displaying multi-path TV program contents, the different multi-channel video transport stream in program source is dynamically shown, this device comprises tuner, selector, system decoder, source decoder, size change over device, aliasing device, microcontroller MCU and buffer SDRAM, wherein, tuner becomes transport stream with radio frequency (RF) conversion of signals; Transport stream after selector is selected, is sent to system decoder with the programme signal source as signal source; System decoder carries out demultiplexing, scramble process to transport stream, and output code flow is sent to source decoder; Source decoder carries out decompress(ion) to sound, video compression signal and contracts the processed images data to the size change over device, control display window size, comprise and be used to regulate the size change over device 1 of main picture image size and the size change over device 2 of adjusting subimage size, send display behind the signal process aliasing device with size change over device 1 and 2 outputs of size change over device again; Microcontroller MCU is the control assembly of system, and buffer SDRAM carries out buffer memory to the data that form in the picture signal processing procedure.
Described tuner can adopt one or two in a cover receiving system, also the transmission stream signal of other apparatus of digital television receiving output can be sent into described selector, as the input program source.Selector, system decoder, source decoder, size change over device, aliasing device can be parts independently, also can be the system level chips of monolithic.System decoder comprises system decoder 1 that the key frame transport stream is handled and the system decoder 2 that the sprite transport stream is handled.Source decoder comprises as the main source decoder of key frame decoding and the component source decoder of decoding as sprite, the treatable picture format of source decoder not only is confined to a kind of form, can comprise MPEG 1, MPEG 2, MPEG 4, H.264, image compression format such as AVS.Main source decoder and component source decoder can be decoded to the I frame in sound, the video compression signal, P frame, B two field picture, and wherein, the component source decoder is decoded or the I two field picture is decoded the I frame in the video compression signal, P two field picture; The audio compression signal can be decoded or adopted CPU, DSP to decode by main source decoder.Selector comprises selector 1 and selector 2, selector 1 selects continuous transport stream to send into system decoder 1, and selector 2 can be selected the continuous transport stream imported into by a tuner or other apparatus of digital television receiving, also can adopt the mode of time-division to switch between different transport stream circularly.
Compared with prior art, characteristics of the present invention are: utilize economic technological means, the mode of employing dual decoding has realized the picture-in-picture (PIP) or picture out picture (POP) display mode of the many pictures of TV programme, make the image of sprite can show (dynamically accurate) dynamically that the broadcast process that makes things convenient for the beholder to understand the sprite program in real time also in time switches to key frame interested channel.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is moving image frame type and transmission sequence schematic diagram;
Fig. 3 is picture-in-picture (PIP) display mode schematic diagram;
Fig. 4 is picture out picture (POP) display mode schematic diagram.
Embodiment
Present embodiment comprises tuner 1 and tuner 2, selector 1 and selector 2, system decoder 1 and system decoder 2, source decoder 1 and source decoder 2, size change over device 1 and size change over device 2, aliasing device, MCU and buffer, wherein, tuner becomes transport stream with radio frequency (RF) conversion of signals; Transport stream after selector is selected, is sent to system decoder with the programme signal source as signal source; System decoder carries out processing such as demultiplexing, descrambling to transport stream, output code flow is sent to source decoder; Source decoder carries out decompress(ion) to sound, video compression signal and contracts the processed images data to the size change over device, comprise and be used to regulate the size change over device 1 of main picture image size and regulate the size change over device 2 of sub-screen image size, control main, sprite display window size respectively, and after the picture signal of key frame and sprite carried out aliasing, send display to show picture signal.
In theory diagram shown in Figure 1, can only select a tuner (101) as signal source, also can select two tuners (101) and (102) as signal source simultaneously, also can will send into selector as signal source by the transport stream (external signal) of other apparatus of digital television receiving output.The output signal of tuner or external signal are all sent into selector 1 (103) and selector 2 (104), selector 1 (103) can only select continuous transport stream to send into system decoder 1 (105), and the mode that selector 2 (104) can adopt the time-division is switched between different transport stream or different program channel circularly.The transport stream of selector 1 (103) and selector 2 (104) outputs sends into system decoder 1 (105) respectively and system decoder 2 (106) carries out demultiplexing, descrambling processing such as (situations that scrambling control is arranged for transport stream).The code stream of system decoder 1 (105) and system decoder 2 (106) outputs sends into main source decoder (107) respectively and component source decoder (108) carries out decompression to sound, video compression signal.
The code stream of sending into source decoder has design feature as shown in Figure 2, comprises 3 kinds of picture frames: I frame, P frame and B frame.If frame by frame image is decoded according to 1～12 order in the schematic diagram, can obtain continuously, the moving image of high definition, but to the having relatively high expectations of decoder, system resource takies more, a cover decoder can only be finished the decoding of one road code stream; If only I frame, P two field picture are decoded, perhaps only the I two field picture is decoded, then can adopt the mode of time-division circularly the multichannel code stream to be decoded, though at this moment the continuity of image and definition are lost, the image that only can show " quasi-moving ", if but with the image of this " quasi-moving " as the subimage content displayed, be enough to the content information of judging that program broadcasts.Present embodiment, is only decoded to the I frame among Fig. 2 under the more situation of the sprite that shows by the control to selector among Fig. 12 (104) and component source decoder (108); Under the less situation of the sprite that shows, only I frame among Fig. 2 and P frame are decoded; Have only at the sprite that shows under one the situation, can all decode the I frame among Fig. 2, P frame and B frame.
Sound, the vision signal that main source decoder (107) and component source decoder (108) are decompressed can be not limited to the concrete form of moving image (comprising sound) compression, can be MPEG 1, MPEG 2, MPEG 4, H.264 or in the motion image formats such as AVS any, the method that main source decoder (107) and component source decoder (108) can decompress according to the form adjustment that image compression adopted.
The audio signal that comprises in the transport stream is only finished decoding by the main source decoder (107) among Fig. 1, thus the sound that broadcasts in the television set always with the image synchronization of key frame.
For making the beholder appreciate shown image better and switching between each program source easily, present embodiment is arranged to key frame and sprite can arbitrarily to change picture dimension, and the position of sprite also can be provided with arbitrarily by the beholder.In picture-in-picture as shown in Figure 3 (PIP) the display mode schematic diagram, key frame is demonstration all over the screen, but the number of sprite, position and picture dimension can be provided with arbitrarily; In picture out picture and for example shown in Figure 4 (POP) the display mode schematic diagram, the picture dimension of key frame can be provided with arbitrarily, and the number of sprite and picture dimension also can be provided with arbitrarily, and after the position of key frame was determined, the position of sprite also can be provided with.
For showing key frame and sprite neatly, need to be equipped with the parts that carry out the picture size conversion in the system, the size change over device 1 (109) among Fig. 1 is for finishing the parts of key frame size change over, and size change over device 2 (110) is for finishing the parts of sprite size change over.The realization of size change over function is to deposit among the SDRAM (113) through the view data behind the source coding, by what its control operation was realized, after finishing view data among the SDRAM (113) behind main, the sub-screen image size change over and sending aliasing device (111) to carry out the image aliasing by size change over device 1 (109) and size change over device 2 (110) respectively, on display, show.
Above-mentioned all operations all is to finish under the control of microcontroller (MCU) or central processing unit (CPU) (112).
Part among Fig. 1 in the frame of broken lines both can be parts independently, also can be the system level chip of monolithic, and present embodiment adopts the system level chip of monolithic, and microcontroller (MCU) is included in the system level chip of monolithic.
Claims (6)
1. the apparatus and method of a multi-picture dynamic condition displaying multi-path TV program contents, the different multi-channel video transport stream in program source is dynamically shown, this device comprises tuner 1 and tuner 2, selector 1 and selector 2, system decoder 1 and system decoder 2, source decoder 1 and source decoder 2, size change over device 1 and size change over device 2, aliasing device, MCU and buffer, wherein, tuner becomes transport stream with radio frequency (RF) conversion of signals; Transport stream after selector is selected, is sent to system decoder with the programme signal source as signal source; System decoder carries out processing such as demultiplexing, descrambling to transport stream, output code flow is sent to source decoder; Source decoder carries out decompress(ion) to sound, video compression signal and contracts the processed images data to the size change over device, comprise and be used to regulate the size change over device 1 of main picture image size and regulate the size change over device 2 of sub-screen image size, control main, sprite display window size respectively, and after the picture signal of key frame and sprite carried out aliasing, send display to show picture signal.
2. the apparatus and method of multi-picture dynamic condition displaying multi-path TV program contents according to claim 1, it is characterized in that: described tuner can adopt one or two in a cover receiving system, also the transmission stream signal of other apparatus of digital television receiving output can be sent into described selector, as the input program source.
3. the apparatus and method of multi-picture dynamic condition displaying multi-path TV program contents according to claim 1, it is characterized in that: described selector, system decoder, source decoder, size change over device, aliasing device, MCU can be parts independently, also can be the system level chips of monolithic.
4. the apparatus and method of multi-picture dynamic condition displaying multi-path TV program contents according to claim 1, it is characterized in that: described source decoder comprises as the main source decoder of key frame decoding and the component source decoder of decoding as sprite, the treatable picture format of source decoder not only is confined to a kind of form, also can comprise MPEG 1, MPEG 2, MPEG 4, H.264, image compression format such as AVS.
5. according to the apparatus and method of claim 1 and the described multi-picture dynamic condition displaying multi-path TV program contents of claim 4, it is characterized in that: described main source decoder and component source decoder are decoded to the I frame in sound, the video compression signal, P frame, B two field picture, wherein, the component source decoder is decoded or the I two field picture is decoded the I frame in the video compression signal, P two field picture; The audio compression signal can by main source decoder decode or transfer to CPU, DSP handles.
6. the apparatus and method of multi-picture dynamic condition displaying multi-path TV program contents according to claim 1, it is characterized in that: described selector comprises selector 1 and selector 2, selector 1 selects continuous transport stream to send into system decoder 1, and selector 2 can be selected the continuous transport stream imported into by a tuner or other apparatus of digital television receiving, also can adopt the mode of time-division to switch between different transport stream circularly.
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| CNA2006101706652A CN101207749A (en) | 2006-12-15 | 2006-12-27 | Apparatus and method for multi-picture dynamic condition displaying multi-path TV program contents |
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