US20030137604A1 - Digital broadcast receiver unit - Google Patents
Digital broadcast receiver unit Download PDFInfo
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- US20030137604A1 US20030137604A1 US10/376,231 US37623103A US2003137604A1 US 20030137604 A1 US20030137604 A1 US 20030137604A1 US 37623103 A US37623103 A US 37623103A US 2003137604 A1 US2003137604 A1 US 2003137604A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4347—Demultiplexing of several video streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
- H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
- H04N21/42638—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners involving a hybrid front-end, e.g. analog and digital tuners
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43637—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
Abstract
A digital broadcast receiver unit for determining the scanning method of the video signal of the selected program when signals multiplexed through a plurality of different scanning methods are received, processing these video signals by an appropriate video signal processor constituting a video encoder, and then outputting the result. This digital broadcast receiver unit includes a demodulator to tune in the channel of the received signal and perform demodulation, a multiplex isolator to isolate the audio, video and other types of data coded from the multiplex signals output from the demodulator, a decoder to decode the video signal and audio signal from the multiplex isolator, a plurality of video processors performing respectively different corresponding scanning methods and connected to an output of the decoder, an output selector to select from among outputs from the plurality of video processors, and a controller to control the output selector and determine the scanning method of the video signal of the selected program and also perform the appropriate processing based on the scanning method for the selected video signal.
Description
- 1. Field of the Invention
- This invention relates to a digital broadcast receiver unit, and in particular, relates to a digital broadcast receiver unit capable of receiving, in one stream, multiplex video signals formatted according to a plurality of differing scanning methods.
- 2. Description of Related Art
- In digital transmission technology, in addition to video and audio signals, all kinds of information can be multiplexed and broadcast over one common carrier wave, i.e., multi-channel broadcasts utilizing this technology have already commenced. By utilizing this digital transmission technology, video signals for different scanning methods can be coded, multiplexed (i.e., placed on one common carrier wave) and then broadcast.
- In contrast, in related art analog broadcast receivers, television receivers are able to receive transmissions from a plurality of analog broadcast systems. In analog broadcasting, however, different kinds of information cannot be multiplexed (or placed together on the same carrier wave) so that the received video signal itself must be analyzed to determine the scanning method. When receiving different video signals having a plurality of scanning systems in the above mentioned related art analog broadcasts, not only was a custom identification means required to analyze and process the received video signal itself, but in order to identify the video signal, video signal processing circuits had to be operated whose operation was not actually necessary.
- In contrast, one important feature of digital broadcasting, however, is that a plurality of information such as audio, video and data can be multiplexed and sent as one transmission stream. Utilizing multiplexed data therefore means that various features can be provided.
- In view of the above problems, it is therefore an object of this invention to provide a digital broadcast receiver for identifying video signal scanning methods utilizing different kinds of multiplexed information, and using such identification for selecting an appropriate scanning method for reproduction.
- In order to achieve the above, this invention is directed to a digital broadcast receiver unit for receiving a digital multiplexed signal stream having multiplexed signals commonly encoded using a same encoding/decoding standard, the multiplexed signals including video signals corresponding to a plurality of different video signal formats, and isolating and reproducing at least one video signal, the unit including: a selector to select and extract one video signal from a received the digital multiplexed signal; a decoder to decode the video signal from the selector according to the encoding/decoding standard; a plurality of video processor sections, with respective video processor sections providing video processing according to a different video signal format of the plurality of different video signal formats; and a controller using information from the received the digital multiplexed signal to determine a video signal format of the video signal from the decoder, and selecting one video processor section of the video processor sections to perform video processing of the video signal according to a determined video signal format thereof. More particularly, the present invention determines the scanning method of the video signal of the selected program and then performs the appropriate processing based on the scanning method for the selected video signal.
- The foregoing and a better understanding of the present invention will become apparent from the following detailed description of the preferred embodiments and claims when read in connection with the accompanying drawings, all forming a part of the disclosure hereof this invention. While the foregoing and following written and illustrated disclosure focuses on disclosing embodiments of the invention which are considered preferred embodiments, it should be clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present invention being limited only by the terms of the appended claims.
- The following represents brief descriptions of the drawings, wherein:
- FIG. 1 shows a block diagram of the first embodiment of this invention;
- FIGS.2A-C are drawings showing exemplary configurations of the digital multiplex stream;
- FIG. 3 is a block diagram showing the configuration of a second embodiment of this invention;
- FIGS.4A-B are drawings showing the configuration of a digital multiplex stream, and a flowchart showing scanning information packet processing, respectively;
- FIG. 5 is a block diagram showing the configuration of a third embodiment of this invention;
- FIG. 6 is a block diagram showing the configuration of a fourth embodiment of this invention;
- FIG. 7 is a block diagram showing the configuration of a fifth embodiment of this invention;
- FIG. 8 is a block diagram showing the configuration of a sixth embodiment of this invention;
- FIG. 9 shows a different block diagram showing of this invention;
- FIG. 10 shows an another different block diagram showing of this invention; and
- FIG. 11 is a flowchart indicative of exemplary processing operations conducted by an application specific integrated circuit (ASIC) or central processing unit (CPU) with respect to the present invention, e.g., via suitable programming.
- Before beginning a detailed description of the subject invention, mention of the following is in order. When appropriate, like reference numerals and characters are used to designate identical, corresponding or similar components in differing figure drawings.
- Hereafter, the embodiment of this inventions will be explained while referring to the accompanying drawings. FIG. 1 is a block diagram showing the structure of the digital broadcast receiver of this invention. An RF carrier wave sent from a communications satellite (not shown) is received at an
antenna 1 and then processed by other components. More particularly, in FIG. 1, thenumeral 1 denotes the antenna, thenumeral 2 is a tuning-demodulation means, thenumeral 3 is an error correction means, thenumeral 5 is a multiplex isolation means for treating a multiplexed signal, thenumeral 6 is a control CPU, thenumeral 11 is an MPEG decoder for decoding the coded audio and video information. Also in FIG. 1, thenumeral 12 is an OSD (On Screen Display) circuit for adding character information to video signals output from the Moving Picture Experts Group (MPEG)decoder 11, thenumeral 13 is a D/A converter for converting digital audio signals into analog signals. Further, in FIG. 1, thenumeral 141 is a video encoder, for instance, to convert 525 interlaced scanning lines of an NTSC system signal into an analog signal and add synchronizing information, etc. Thenumeral 142 is a video encoder, for instance, to convert 525 scanning lines of asequential scanning 525 progressive signal (hereafter abbreviated to 525P signal) into an analog signal and add synchronizing information, etc. Thenumeral 143 is a video encoder, for instance, to convert the 1080 interlaced scanning lines of an HDTV system signal into an analog signal and add synchronizing information, etc. Thenumeral 15 in the same figure is a video signal output terminal, thenumeral 16 is an audio signal output terminal, and thenumeral 27 is an output selection means. - The signal received by the
antenna 1 is tuned and demodulated by the tuning-demodulation means 2. The demodulated signal from the tuning-demodulation means 2 is output to the error correction means 3. Error correction based on the addition of an error correction code is then performed by the error correction means 3. Next, according to control provided by theCPU 6, a signal of a program for viewing is demultiplexed (isolated from the other signals) and output by the multiplex isolation means 5. - The coded audio data and coded video data isolated by the multiplex isolation means5 is applied to the
MPEG decoder 11. TheMPEG decoder 11 decodes the coded data into the digital signal that was present prior to MPEG coding, i.e., according to control provided by theCPU 6. The digital video signal output from theMPEG decoder 11 is applied to the OSD means 12 which adds character information according to control by theCPU 6, and is sent to thevideo encoders CPU 6. As a parallel operation, the digital audio signal output from theMPEG decoder 11 is applied to the D/A converter 13, and converted to an analog audio signal. The output from thevideo encoders video encoders control CPU 6, and the selected video signal is output. This process allows the analog video signal and analog audio signal sent from the transmitting side to be played back and output in parallel to the videosignal output terminal 15 and the audiosignal output terminal 16, respectively. - The operation when processing video signals for different broadcast systems was explained above. FIG. 2A shows the structure of one unit of the multiplexed signal referred to as a transport stream packet (hereafter TS packet). The TS packet is comprised of a payload for storing data (e.g., video, audio and other info.), a header for indicating data such as identification (e.g., packet number) and/or scanning approach (e.g., NTSC, PAL, etc.) data, and an error correction check bit for performing error correction. As shown in FIG. 2B, in a digital broadcast, multiplexing of video signals in one stream for a plurality of differing scanning methods can be performed. FIG. 2C shows (without headers and error correction check bits) a state of a TS packet in the case where an NTSC signal and an HDTV signal are multiplexed as one example. As is apparent from such Fig., video signals of different scanning systems do not have to be alternately or periodically provided, but instead, can be provided in any order.
- When the viewer selects the desired program from such signals, e.g., through any know remote or switch arrangement (not shown), the multiplex isolation means5 responds thereto, and only the coded audio data and the coded video data that comprises the selected program is isolated and output from the multiplex isolation means 5. The coded video data and coded audio data which is output is applied to the
MPEG decoder 11. The coded video data includes data detailing the scanning method. TheMPEG decoder 11 detects the data detailing the scanning method from the input coded data and conveys this data to thecontrol CPU 6. Based on the information conveyed from theMPEG decoder 11, and the determination of the present scanning method, the CPU 6 (via suitable software programming) controls thevideo encoders video encoders - As explained previously, operation of the
video encoders MPEG decoder 11 of this invention and the selection means 27 not only allows processing and output of the signal for the correct scanning method, but also allows shutting off of the power to video encoders not currently needed and to stop their operation so that useless expenditure of unnecessary power and generation of unnecessary heat is prevented. Further, the generation of signal interference is also reduced. - Additionally, although in FIG. 1 there is illustrated a configuration in which a signal having a system corresponding to each of the
video encoders video encoders unit 900, e.g., a set-top box), and thereby the controllingCPU 6 controls in such a way that only the circuit coinciding with the scanning system of an input signal in thevideo encoders unit 1000, e.g., set-top box), a signal output terminal of each of the scanning systems is connected to theswitch 27′ so that theswitch 27′ is controlled by the controllingCPU 6, whereby an output terminal of the OSD means 12 coinciding with a video scanning system of a selected TV program is selected, and the signal is inputted to the video encoder. Concurrently, only the video encoder corresponding to the inputted video signal may be allowed to operate under the control of theCPU 6. As described above, either configuration shown in FIGS. 9 and 10 provides an effect similar to that exhibited by the configuration shown in FIG. 1. - The second embodiment of this invention is next explained while referring to FIG. 3.
Reference numeral 14 in FIG. 3 denotes a video encoder. The embodiment of FIG. 3 differs from the embodiment of FIG. 1 in that the configuration of thevideo encoder 14 is a singular circuit, e.g., a sub-processor, etc., which versatilely permits processing of any of the NTSC signals, 525 signals or HDTV signals. More particularly, thevideo encoder 14 can be provided as a sub-processor or singular application specific-integrated circuit (ASIC) chip, having segregated processing sub-programs or processing areas which can be selectively enabled/disabled to permit processing according to an appropriate scanning method. While the FIG. 1 approach of separately provided encoders has the power saving advantage that unneeded encoders can be powered down, a FIG. 3 software implemented approach has the advantage that theencoder 14 can be easily changed/customized via simple software reprogramming. Thecontrol CPU 6 operates thevideo encoder 14 so as to match the scanning method detected by theMPEG decoder 11 with any of the three previously related processing means based on information conveyed from theMPEG decoder 11. - More specifically, for instance, video filter parameters which limit the available video band are regulated. In addition, in FIG. 3, the
video encoder 14 may be constructed to have a configuration where a parameter is fixed in such a way that it may be adapted only for a predetermined kind of video signal. Alternatively, the parameter may be constructed to have a configuration that it is not fixed by thevideo encoder 14 by itself, but an optional value is selected by the controllingCPU 6. For the configuration when the fixed parameter is selected, it is possible to simplify the control to be carried out by the controlling CPU. In the case of the configuration in which an optional value is selected by the controllingCPU 6, it is possible to cope with video signals of all known scanning systems. With such an arrangement as above, the video signal inputted to thevideo encoder 14 is correctly encoded and outputted from theoutput terminal 15 as an analog video signal. This process allows the signals input to thevideo encoder 14 to be sent from theoutput terminal 15 as correctly encoded analog video signals. As explained above, processing of signals for the correct scanning method can be performed since this invention controls thevideo encoder 14 according to the appropriate scanning method, based on information on the scanning method detected by theMPEG decoder 11. - The embodiments in FIGS. 1 and 3 showed examples of detection with an
MPEG decoder 11 of scanning method data containing coded image data. However, as shown for example in FIG. 4A, when there is a TS packet holding data showing the scanning method for each video signal in the payload, the data in the TS packet listing the scanning methods can be isolated by means of the above multiplex isolation means 5, and conveyed to thecontrol CPU 6 for subsequent use in control of the selection means 27 and the video encoder. A flowchart of this process is shown in FIG. 4B. Even in this case, the results will clearly be the same as when detecting the scanning method with theMPEG decoder 11. - The third embodiment of this invention is shown in FIG. 5. The embodiment of FIG. 5 differs from the embodiment of FIG. 1 for instance, in that a signal transmission means24 is provided for sending a signal to a television receiver, e.g., an infrared signal. This signal transmission means 24 sends an infrared signal derived from information from the
MPEG decoder 11, and such infrared signal contains information indicating the scanning method of the video signal. This arrangement for instance allows the scanning method of the video signal detected by theMPEG decoder 11 to be conveyed to atelevision receiver 25 having a means to receive the aforementioned infrared signal and also able to handle a plurality of scanning methods (e.g., a multi-sync or multi-scan capable television receiver), when thistelevision receiver 25 is connected to the videosignal output terminal 15. The scanning method of the video signal for thetelevision receiver 25 is therefore switched to match the scanning method output from the videosignal output terminal 15 so that a viewer need not provide and/or manually manipulate a separate scanning method switcher. - FIG. 5 showed an example using an infrared signal as a signal transmission means24, however this invention is not limited to this method and an RF waveform signal sending means may also be utilized to send an RF carrier wave signal without an infrared signal. A television receiver provided with this RF waveform signal receiving capability and connected to the video
signal output terminal 15 will achieve the same effect of the invention. - FIG. 6 shows the fourth embodiment of this invention. The embodiment of FIG. 6 differs from the embodiment of FIG. 5 in that rather than using a wireless signal such as infrared to show the scanning method of the video signal, an electrical signal is instead conveyed by a wire utilizing an electrical or electronic signal transmission means26. Using the configuration in FIG. 6 will clearly achieve the same effect of the invention as in the embodiment of FIG. 5.
- A fifth embodiment of the invention is shown in FIG. 7. The embodiment of FIG. 7 differs from the embodiment of FIG. 1 in that the digital broadcast receiver of this invention is housed in a
same cabinet 700 with a display unit, or in other words, this embodiment comprises a television with an internal digital broadcast receiver unit. In FIG. 7, thereference numeral 28 denotes a display signal processing means, 29 denotes an audio signal processing means, 30 denotes a display means such as a CRT or liquid crystal display panel or a plasma display panel, and 31 denotes an audio signal output means such as a speaker. In FIG. 7, the display processing means 28 and the display means 30 are configured, for example, so that an NTSC signal, a 525P signal or a HDTV signal can be displayed. Also in FIG. 7, thecontrol CPU 6 detects the video signal scanning method that was selected, operates thevideo encoders - The sixth embodiment of this invention is shown in FIG. 8 (implemented as a self-contained
unit 800, e.g., set-top box). FIG. 1 shows a configuration in which the selector means 27 selects and issues an output from thevideo encoders video encoders separate output terminals - FIG. 11 is a flowchart indicative of exemplary processing operations conducted by the
CPU 6 with respect to the present invention, e.g., via suitable programming. Such operations are repetitively performed over time. - In the above explanation, the RF carrier wave received by the
antenna 1 was sent from an artificial satellite however needless to say, this invention is also applicable in cases where the RF carrier wave is sent from an antenna installed on a ground device. Further, the above explanation described an example of digital broadcast receiver compatible with the three scanning methods consisting of an NTSC signal, a 525P signal and an HDTV signal. However the same effect of the invention can be obtained with a configuration in which other video signal scanning methods are handled by a compatible MPEG encoder or video encoder. Further, as technology advances further approaches/methods applicable for use with the present invention will be found. - In the digital broadcast receiver of this invention as explained above therefore, video signals can be correctly played back and output even when a plurality of video signals of different scanning methods are received as multiplexed signals in one stream.
- This concludes the description of the preferred embodiments. Although the present invention has been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More particularly, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the invention. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.
Claims (23)
1. A digital broadcast receiver unit for receiving a digital multiplexed signal stream having multiplexed signals commonly encoded using a same encoding/decoding standard, said multiplexed signals including video signals corresponding to a plurality of different video signal formats, and isolating and reproducing at least one video signal, said unit comprising:
a selector to select and extract one video signal from a received said digital multiplexed signal;
a decoder to decode the video signal from said selector according to said encoding/decoding standard;
a plurality of video processor sections, with respective video processor sections providing video processing according to a different video signal format of said plurality of different video signal formats; and
a controller using information from the received said digital multiplexed signal to determine a video signal format of said video signal from said decoder, and selecting one video processor section of said video processor sections to perform video processing of said video signal according to a determined video signal format thereof.
2. A unit as claimed in claim 1 , wherein said digital multiplexed signal is more specifically a packetized digital multiplexed signal with differing groups of packets relating to said different video signal formats, and wherein said selector selecting and extracting a group of packets relating to said one video signal from a received said digital multiplexed signal.
3. A unit as claimed in claim 2 , wherein said packetized digital multiplexed signal further contains a separate group of control packets containing at least one of packet identification information, control information, video signal format information, and on-screen display information, related to ones of said differing groups of packets.
4. A unit as claimed in claim 2 , wherein each individual packet of said packetized digital multiplexed signal more specifically contain a sub-packet portion containing at least one of packet identification information, control information, video signal format information and on-screen display information, related to said individual packet.
5. A unit as claimed in claim 1 , wherein said plurality of video processor sections is more specifically a plurality of discrete video processors.
6. A unit as claimed in claim 1 , wherein said plurality of video processor sections is more specifically provided via at least one of a common application specific integrated circuit (ASIC) and a common microprocessor adapted to selectively perform processing according to any of said plurality of video processor sections.
7. A unit as claimed in claim 6 , wherein said selecting by said controller is more specifically performed by said controller selectively performing processing with respect to said one video processor section while not performing processing with respect to other ones of said video processor sections.
8. A unit as claimed in claim 1 , wherein said selecting by said controller is more specifically performed by a selector switch controlled to select any output of outputs from said video processor sections, according to said determined video signal format.
9. A unit as claimed in claim 1 , wherein, said selecting by said controller is more specifically performed by a selector switch controlled to select any input signal of a plurality of input signals to said video processor sections, said plurality of input signals corresponding to said plurality of different video signal formats, respectively.
10. A unit as claimed in claim 1 , wherein said selecting by said controller is more specifically performed by said controller selectively enabling said one video processor section while disabling other ones of said video processor sections.
11. A unit as claimed in claim 1 , wherein said encoding/decoding standard is more specifically a Moving Picture Experts Group (MPEG) encoding/decoding standard.
12. A unit as claimed in claim 1 , wherein said digital multiplexed signal further includes at least one of an audio signal and an information signal.
13. A digital broadcast receiver unit for receiving a digital multiplexed signal stream having multiplexed signals commonly encoded using a same encoding/decoding standard, said multiplexed signals including digitally converted audio signals, different kinds of information and video signals corresponding to a plurality of video signal scanning methods, and for isolating and reproducing at least one signal from among said audio signals, said video signals and said different kinds of information, said unit comprising:
a demodulation means for tuning in a channel of a received signal and performing demodulation thereof;
a multiplex isolation means to isolate an audio signal, a video signal and other types of data coded from said multiplexed signals output from said demodulation means;
a decoding means to decode said audio signal and said video signal from said multiplex isolation means;
a plurality of video processing means for performing processing of said video signal from said decoding means, according to said plurality of video signal scanning methods;
an output selection means for selecting an output from said plurality of video processing means; and
a control means for determining a scanning method of said video signal of said channel, and for controlling said output selection means based on a determined said scanning method for said video signal.
14. A unit as claimed in claim 13 , wherein said scanning method is determined by analyzing information provided by said decoding means.
15. A unit as claimed in claim 13 , wherein said control means operates based on information isolated with said multiplex isolation means, such information being used for determining said scanning method of said channel.
16. A unit as claimed in claim 13 , wherein signals according to said plurality of video signal scanning methods are output from a common output terminal.
17. A unit as claimed in claim 13 , wherein signals according to said plurality of video signal scanning methods are sent from respective different output terminals.
18. A unit as claimed in claim 13 , wherein an optical signal output means is provided to output an optical signal containing information designating a determined said scanning method of said video signal for said channel.
19. A unit as claimed in claim 13 , wherein an electrical signal output means is provided to output an electrical signal containing information designating a determined said scanning method of said video signal for said channel.
21. A unit as claimed in claim 13 , wherein a radio frequency signal output means is provided to output a radio frequency signal containing information designating a determined said scanning method of said video signal for said channel.
22. A unit as claimed in claim 13 , further comprising a display means operable according to said plurality of video signal scanning methods, and wherein said control means switches a video signal scanning method for said display means based on a determined said scanning method of said video signal for said channel.
23. A unit as claimed in claim 13 , wherein said control means is capable of stopping total or partial operation of said plurality of video processing means.
24. A digital broadcast receiver unit for receiving a digital multiplexed signal stream having multiplexed signals commonly encoded using a same encoding/decoding standard, said multiplexed signals including digitally converted audio signals, different kinds of information and video signals corresponding to at least two video signal scanning methods, and for isolating and reproducing at least one signal from among said audio signals, said video signals and said different kinds of information, said unit comprising:
a demodulation means for tuning in a channel of a received signal and performing demodulation thereof;
a multiplex isolation means to isolate an audio signal, a video signal and other types of data coded from said multiplexed signals output from said demodulation means;
a decoding means to decode said audio signal and said video signal from said multiplex isolation means;
a plurality of video processing means for performing processing of said video signal from said decoding means, according to said at least two video signal scanning methods;
a control means for determining a scanning method of said video signal of said channel, and for operating said plurality of video processing means based on a determined said scanning method for said video signal.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/376,231 US20030137604A1 (en) | 1997-08-21 | 2003-03-03 | Digital broadcast receiver unit |
US10/725,456 US7173674B2 (en) | 1997-08-21 | 2003-12-03 | Digital broadcast receiver unit |
US11/024,874 US7436458B2 (en) | 1997-08-21 | 2004-12-30 | Digital broadcast receiver unit |
US12/196,640 US7889281B2 (en) | 1997-08-21 | 2008-08-22 | Digital broadcast receiver unit |
US13/022,971 US8345168B2 (en) | 1997-08-21 | 2011-02-08 | Digital broadcast receiver unit |
US13/731,215 US8913197B2 (en) | 1997-08-21 | 2012-12-31 | Digital broadcast receiver unit |
US14/571,536 US9532101B2 (en) | 1997-08-21 | 2014-12-16 | Digital broadcast receiver unit |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP09-224605 | 1997-08-21 | ||
JP22460597A JP3564961B2 (en) | 1997-08-21 | 1997-08-21 | Digital broadcast receiver |
US09/135,727 US6549243B1 (en) | 1997-08-21 | 1998-08-18 | Digital broadcast receiver unit |
US10/376,231 US20030137604A1 (en) | 1997-08-21 | 2003-03-03 | Digital broadcast receiver unit |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/135,727 Continuation US6549243B1 (en) | 1997-08-21 | 1998-08-18 | Digital broadcast receiver unit |
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US14/571,536 Expired - Fee Related US9532101B2 (en) | 1997-08-21 | 2014-12-16 | Digital broadcast receiver unit |
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US11/024,874 Expired - Fee Related US7436458B2 (en) | 1997-08-21 | 2004-12-30 | Digital broadcast receiver unit |
US12/196,640 Expired - Fee Related US7889281B2 (en) | 1997-08-21 | 2008-08-22 | Digital broadcast receiver unit |
US13/022,971 Expired - Fee Related US8345168B2 (en) | 1997-08-21 | 2011-02-08 | Digital broadcast receiver unit |
US13/731,215 Expired - Fee Related US8913197B2 (en) | 1997-08-21 | 2012-12-31 | Digital broadcast receiver unit |
US14/571,536 Expired - Fee Related US9532101B2 (en) | 1997-08-21 | 2014-12-16 | Digital broadcast receiver unit |
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1998
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2003
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2004
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2011
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US20030206242A1 (en) * | 2000-03-24 | 2003-11-06 | Choi Seung Jong | Device and method for converting format in digital TV receiver |
US7206025B2 (en) * | 2000-03-24 | 2007-04-17 | Lg Electronics Inc. | Device and method for converting format in digital TV receiver |
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US7495706B2 (en) * | 2004-08-24 | 2009-02-24 | Funai Electric Co., Ltd. | Video signal setting device for performing output setting to a display device |
US20070174895A1 (en) * | 2005-12-30 | 2007-07-26 | Yao Zhigang | Video and audio front end assembly and method |
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CN102131105A (en) * | 2010-01-14 | 2011-07-20 | 索尼公司 | Information processing apparatus, information processing method, and program |
Also Published As
Publication number | Publication date |
---|---|
JP3564961B2 (en) | 2004-09-15 |
JPH1169247A (en) | 1999-03-09 |
US20040233332A1 (en) | 2004-11-25 |
US8345168B2 (en) | 2013-01-01 |
US20130113995A1 (en) | 2013-05-09 |
US7889281B2 (en) | 2011-02-15 |
US20050110905A1 (en) | 2005-05-26 |
US7173674B2 (en) | 2007-02-06 |
US8913197B2 (en) | 2014-12-16 |
US20110134341A1 (en) | 2011-06-09 |
US20150101005A1 (en) | 2015-04-09 |
US9532101B2 (en) | 2016-12-27 |
US6549243B1 (en) | 2003-04-15 |
US7436458B2 (en) | 2008-10-14 |
US20090066856A1 (en) | 2009-03-12 |
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