JP2008154149A - Video image processing apparatus and its channel preset method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately carry out channel preset without missing, overlapping, etc. of channels for all digital television broadcasting of an ATSC (Advanced Television Systems Committee) system including exceptional broadcasting in which information relating to the channel is insufficient or overlapping in a video image processing apparatus with a receiving function of digital television broadcasting of the ATSC system. <P>SOLUTION: A channel preset processing unit 12 assigns suitable virtual channels so as for the register not to overlap in CH-DB (Channel Database) 13, and temporarily registers for all digital television broadcasting of the ATSC system which can be received including exceptional broadcasting in which information relating to the channel is insufficient, or overlapping. Afterward, it writes in registering contents of the CH-DB 13 in a memory 4, and appropriately performs channel preset without missing, overlapping of channels, etc. of all digital television broadcasting of the ATSC system which can be received. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video processing apparatus having a reception function of an advanced television systems committee (ATSC) system implemented in the United States and the like, and a channel preset method thereof, and more particularly, information related to a channel is insufficient. The present invention relates to a new channel preset corresponding to exceptional broadcasting such as overlapping or overlapping.

  Conventionally, in the United States and the like, digital television broadcasting of the Advanced Television Systems Committee (ATSC) system has been implemented (or scheduled).

  In this ATSC digital TV broadcast, unlike analog TV broadcast, each physical channel corresponding to the RF frequency (channel selection frequency) has one or more subchannels, and each subchannel has a physical channel. A virtual channel number (hereinafter referred to as V-CH) composed of a corresponding 4-digit main value channel number and a sub channel number is assigned.

  Furthermore, in ATSC digital television broadcasting, a 1-part (ONE-PART) channel and a 2-part (TWO-PART) channel are defined. The 1-part channel is the same channel as the conventional analog television broadcast channel specified by the channel number of the main value, and the 2-part channel is specified by the channel number of the main value and the channel number of the sub-value. Is a channel.

  Each sub-channel is assigned a V-CH number of 1-part channel or 2-part channel, with the sub-value being “0” for 1-part channel, and selected and received by this V-CH number. It can be demodulated.

  Next, in the ATSC digital television broadcasting, MPEG-2 is adopted as a video compression method, AC-3 is adopted as a sound compression method, and video and audio signals of a program are band-compressed by respective compression methods. Is done.

  Then, the compressed video and audio of one or a plurality of subchannels are divided into transport packets, and a transport stream (Transport Stream) (hereinafter referred to as TS) in which the transport packets are continuous. Is distributed as a digital signal.

  At this time, in addition to video and audio, the control information data related to the broadcast program is simultaneously packetized and transmitted by the TS. The control information includes PSIP (Program and System Information Protocol) having viewing restrictions, program information, text broadcast information, V-CH information, and the like.

  Conventionally, some video processing apparatuses such as a television receiver and a video recording / reproducing apparatus for receiving such ATSC digital television broadcasting have a channel preset function.

  The video processing apparatus having the channel preset function analyzes the PSIP of the TS obtained by receiving and demodulating by the channel preset based on the first power-on and the channel preset of the menu selection thereafter, and program specifying information ( Program Specific Information Virtual Channel Table (hereinafter referred to as VCT) is generated, each V-CH of this VCT is stored in a preset, and channel selection operation is performed after channel preset based on this preset storage. The channel selected by the above is identified, and the digital broadcast of the channel is received and demodulated.

  However, for example, in US digital television broadcasting, there are exceptional broadcasts such as a broadcast lacking V-CH information, an illegal V-CH broadcast, and a broadcast with overlapping V-CH.

  For such exceptional broadcasting, it is difficult for the conventional video processing apparatus having a channel preset function to perform proper channel presetting.

  That is, a broadcast in which information in PSIP is missing (insufficient), a broadcast in which there is no V-CH in PSIP and a VCT existing in PMT (Program Map Table) is illegal, or a duplicate with the same PSIP Exceptional broadcasts such as are not different from regular normal broadcasts in other respects. Although they can be received originally, proper channel presets cannot be performed in the past, so they are received after channel presets. Cannot receive or display the reception screen.

  Therefore, for a digital television broadcast in which the PSIP does not exist and the VCT cannot be obtained, which is an example of an exceptional broadcast, each PMT in a lower layer of a PAT (Program Association Table) included in the received TS is analyzed. Then, a V-CH is generated with the subchannel number as the packet order ID of each PMT, and each receivable (selectable) V-CH including this V-CH is displayed on an OSD (On Screen Display) channel. It has been proposed to enable reception of presets (see, for example, Patent Document 1).

  TS is roughly composed of PAT and PSIP, and the PAT has a structure schematically shown in FIG. PATα1 in the figure includes all PMTα21, α22,... In the TS, each PMTα21, α22,... Includes video, audio, and time information streams α31, α32, α33 for one channel, and there is a VCT. In some cases. The VCT existing in the PMT α21, α22,... Includes data for one channel in the VCT existing in PSIP, and includes V-CH information.

  In addition, each PMT α21, α22,... Of one TS is assigned a sequential program number (hereinafter referred to as “P-NUM”) shown in FIG. 9 “program No.”, and this P-NUM is included in the VCT. In accordance with the ATSC standard, each corresponding channel information of the corresponding VCT and PMT α21, α22,... Must be the same P-NUM.

  Furthermore, PAT, PMT, and video (Video), audio (Audio), and time information (PCR: Program Clock Reference) streams α31 to α33 in the PMT are assigned IDs called PID (Packet Identifier), respectively. .

  In addition, VCT basically exists in PSIP. When this VCT is distinguished between terrestrial and CATV, the terrestrial is described as TVCT (Terrestrial Virtual Channel Table), and the CATV cable signal is represented by CVCT (Cable. (Virtual Channel Table). The VCT in the PSIP has a structure schematically shown in FIG. In the VCT β1 in the figure, the V-CH of each channel, the P-NUM of the PMT used in this V-CH, and the PID are written in the units β21, β22,.

  On the other hand, in a receiving device that receives digital terrestrial television broadcasts in Japan, if a plurality of broadcasts are duplicated in the channel number of the area specified by the user at the time of channel preset, a branch number is added to the duplicated broadcasts. Different channel numbers have been proposed (see, for example, Patent Document 2).

In addition, when branch numbers are added to overlapping broadcasts as described above, it is also possible to display a list of the numbers so that overlapping broadcasts can be selected, and it is also proposed to assign overlapping broadcasts to available remote control numbers. (For example, refer to Patent Document 3).
JP 2002-344838 A (abstract, paragraphs [0009], [0023]-[0026], FIG. 1, FIG. 4 etc.) JP 2004-343235 A (Abstract, paragraphs [0023]-[0028], FIG. 1, FIG. 3, etc.) JP 2004-222049 A (paragraphs [0027]-[0033], FIG. 1, FIG. 3, etc.)

  In the case of the channel preset described in Patent Document 1, there is a problem that the same V-CH broadcast in which PSIP exists overlaps the channel preset as it is, and in particular, there are a plurality of identical V-CH broadcasts in one part channel. When doing so, there is a problem that everything is preset to the same one-part channel. For broadcasts where PSIP does not exist and VCT cannot be obtained from PSIP, if there are many such broadcasts, multiple presets are duplicated on the same channel, or illegal PMT There is a risk of presetting V-CH by mistake, and depending on MPEG-2 data acquisition conditions, the preset V-CH may be replaced for each channel preset.

  On the other hand, since the channel presets described in Patent Documents 2 and 3 are preset by distinguishing overlapping channels by assigning branch numbers, the channel presets are channel presets for ATSC digital television broadcasting such as the United States. The number of digits of V-CH to be preset is increased by the number of branch numbers, and in areas where there are many overlapping broadcasts, the number of digits of branch numbers increases, making channel management complicated. It becomes difficult. Moreover, it cannot cope with channel presets such as broadcasting lacking V-CH information and illegal V-CH broadcasting.

  In other words, this type of conventional video processing apparatus having a channel preset function for an ATSC digital television broadcast is a broadcast lacking V-CH information, an illegal V-CH broadcast or a broadcast with overlapping channels, That is, it is not possible to properly preset all receivable broadcasts including exceptional broadcasts such as duplication and lack of information related to the channel without omission.

  The present invention relates to all digital television broadcasts that can be received, including exceptional broadcasts in which information related to channels is insufficient or duplicated in a video processing apparatus having a reception function for digital television broadcasts of the ATSC system. The purpose is to preset the channel properly without any overlap of channels.

  In order to achieve the above-described object, the video processing apparatus of the present invention is a video processing apparatus having an ATSC digital television broadcast reception function. Stationary detection means for detecting whether reception demodulation is performed, and VCT presence / absence determination for determining whether VCT exists in PSIP of the received and demodulated TS every time the station detection means detects reception demodulation of TS And VCT presence / absence determining means determines whether the V-CH of the main (Major) value and the sub (Minor) value of the VCT is already registered in the channel database unit for temporary registration. A channel for presetting the V-CH of the main value and the sub-value of the VCT according to unregistered determination by the registration presence / absence determining unit Then, the temporary registration processing means for registering in the channel database unit and setting a flag indicating that there is an unregistered channel by determining whether the registration is present or not, and determining whether there is no VCT by the VCT presence / absence determining means. A PMT discriminating means for discriminating at least P-NUM coincidence / non-coincidence between VCT and PMT existing in the PMT, and a flag indicating that there is an unregistered channel is set by the discriminating discrimination of the PMT discriminating means. A first exception processing means for generating a V-CH having a main value as a physical channel value corresponding to the channel selection frequency and a sub-value as a P-NUM of the PMT; and a V− generated by the first exception processing means. If CH is not registered in the channel database part, the V-CH is preset in the channel database part. A second exception processing unit that sets a flag indicating that there is an unregistered channel if the V-CH generated by the first exception processing unit is already registered in the channel database unit; Upon completion of the frequency increase / decrease variable, the unregistered preset channel in which the flag indicating that there is an unregistered channel is set as a V-CH that does not overlap with each V-CH registered in the channel database unit, and the channel database. Additional registration processing means for additionally registering in the unit and main registration processing means for writing and setting each V-CH temporarily registered in the channel database unit in the channel preset memory after completion of the additional registration. (Claim 1).

  In the video processing apparatus according to the present invention, the additional registration means may determine whether the V-CH of the PSIP VCT is a one-part channel or a two-part channel for an unregistered preset channel that the VCT presence / absence judging means has VCT. And, based on the identification, the V-CH different from the registered V-CH of each of the 1 part channel and the 2 part channel of the channel database unit is determined and additionally registered in the channel database unit. (Claim 2).

  Next, the channel preset method of the video processing apparatus according to the present invention is a channel preset method of the video processing apparatus having a reception function of the ATSC system digital television broadcast, and the channel selection frequency is increased or decreased by setting the channel preset. Each time a TS is received and demodulated, it is determined whether or not a VCT exists in the PSIP of the received and demodulated TS. When a VCT exists in the PSIP, the VCT of the main (Major) value and the sub (Minor) value of the VCT. It is determined whether or not -CH is already registered in the channel database unit for temporary registration, and if not registered, the V-CH of the main value and sub-value of the VCT is registered in the channel database unit as a preset channel, If it is already registered, the flag indicating that there is an unregistered channel is set, and there is no VCT in PSIP. If the P-NUM matches, the flag indicating that there is an unregistered channel is set. If the P-NUM does not match, the VCT present in the TS PMT matches at least the P-NUM. Generates a V-CH having a main value as a physical channel value corresponding to the channel selection frequency and a sub-value as a PMT of the PMT. If the generated V-CH is not registered in the channel database unit, the V-CH CH is registered as a channel to be preset in the channel database part, and if the generated V-CH is already registered in the channel database part, a flag indicating that there is an unregistered channel is set, Unregistered preset channels with the unregistered channel flag set in the channel database section A V-CH that does not overlap with each recorded V-CH is determined and additionally registered in the channel database unit, and after completion of the additional registration, each V-CH temporarily registered in the channel database unit is used for channel presetting. It is characterized in that it is set by writing in the above memory (claim 3).

  The channel preset method of the video processing apparatus according to the present invention identifies whether the V-CH of the PSIP VCT is a 1-part channel or a 2-part channel for an unregistered preset channel with VCT. On the basis of this, the V-CH different from the already registered V-CH for each of the one-part channel and the two-part channel of the channel database part is determined and additionally registered in the channel database part (claim 4).

  According to the first and third aspects of the present invention, in the channel preset, the channel selection range is searched by changing the channel selection frequency. When this search is performed, an ATSC digital television broadcast is received and a TS is received and demodulated. Then, it is determined whether or not VPS exists in the PSIP.

  In a normal broadcast in which VCT exists in PSIP, since V-CH of VCT is normal and correct channel information, the main value and sub-value V-CH of the VCT are stored in a channel database section (hereinafter referred to as CH-). DB) is temporarily registered (provisionally registered) in the CH-DB as a preset channel on condition that the same V-CH is not registered in the DB. At this time, if the same V-CH is already registered in the CH-DB, in order to prevent duplicate registration, the flag indicating that there is an unregistered channel is set without registering that V-CH.

  In addition, for digital television broadcasting in which channel information for which no VCT exists in the PSIP of the demodulated TS is insufficient, if the VCT existing in the PMT of the received demodulated TS matches the P-NUM of the PMT, Assuming that V-CH of the VCT is valid, a flag indicating that there is an unregistered channel is set to prevent duplicate registration.

  On the other hand, if the VCT existing in the PMT of the received demodulated TS does not match the P-NUM of the PMT, the V-CH of the VCT is invalid, so the main value of the channel selection frequency and the P-NUM of the PMT If the same V-CH is not registered in order to prevent duplicate registration of CH-DB, a new V-CH is generated based on the sub-value of the V-CH as a preset channel for the CH-DB. When temporarily registered (temporary registered) and the same V-CH is registered, the flag indicating that there is an unregistered channel is set without registering the V-CH.

  In this way, only the broadcasts including the V-CHs that are regular and have no fear of duplicate registration among the searched digital television broadcasts within the channel selection range are set as channels preset by the V-CHs. Are registered temporarily, and the remaining broadcast V-CH is not registered and a flag indicating that there is an unregistered channel is set.

  When the search of the channel selection range is completed, V-CHs are determined so as not to overlap with each V-CH registered in the CH-DB for an unregistered channel in which the flag indicating that there is an unregistered channel is set. Those V-CHs are additionally registered in the CH-DB.

  Thereafter, each V-CH of the CH-DB is written and set in the channel preset memory, and the channel preset is completed.

  Therefore, in a video processing apparatus having a reception function of an ATSC digital television broadcast, broadcasts that lack channel information or broadcasts that may have overlapping V-CHs are collectively collected after the search of the tuning range is completed. With this configuration, V-CH is determined so that all receivable broadcasts including exceptional broadcasts where channel-related information is lacking or duplicated are properly channel-preset without duplication. be able to.

  According to the second and fourth aspects of the present invention, when the VCT is present in the PSIP of the received and demodulated TS, the unregistered preset channel is set to the original one-part channel or two-part according to the V-CH of the VCT. It can be preset as a channel, there is no sense of incongruity such as channel selection operation after the preset, and the performance of the channel preset is further improved.

  Next, in order to describe the present invention in more detail, an embodiment thereof will be described in detail with reference to FIGS.

  FIG. 1 shows a block configuration of a main part of a television receiver 1 as a video processing apparatus, FIGS. 2 to 4 are flowcharts of channel preset processing of the television receiver 1, and FIG. 5 is additional registration processing of FIG. It is a detailed flowchart.

  FIG. 6 shows a screen 7a for prompting a channel preset displayed on the screen display unit 7 of the television receiver 1 when the power is first turned on (at the first startup). FIG. 7 shows the screen display unit 7 by a user's selection operation. A menu screen 7b to be displayed is shown. FIG. 8 shows the screen 7c of the screen display unit 7 during channel presetting.

(Constitution)
The television receiver 1 of FIG. 1 is a US-specification television receiver having an ATSC digital television broadcast reception function. In FIG. 1, reference numeral 2 denotes a reception demodulator connected to an antenna or a CATV cable. A tuner and a front end section for performing digital demodulation processing at the subsequent stage, etc., receive an RF signal of a channel selection channel for antenna reception or cable input, perform digital decoding processing, and output a received and demodulated TS of the channel.

  Reference numeral 3 denotes a channel selection control unit that controls reception channel selection of the reception demodulating unit 2. Based on channel information of each V-CH in the non-volatile channel preset memory 4, the reception demodulating unit 2 is controlled by a user operation or timer. Control is performed for reception demodulation of V-CH digital television broadcasting specified by control and reception demodulation of sweep search for changing the channel selection frequency at the time of channel preset.

  Reference numeral 5 denotes a video / audio decoder unit subsequent to the reception demodulator 2, and MPEG-2 compressed video and AC-3 compressed audio of the TS received and demodulated by the reception demodulator 2 are converted into baseband video, Demodulate to audio digital signal.

  Reference numeral 6 denotes a video processing unit following the video / audio decoder unit 5, which performs digital / analog conversion of a digital signal of the video to form a screen display output. Reference numeral 7 denotes a screen display unit including a liquid crystal display, a plasma display, or a CRT. The received video is displayed on the screen based on the screen display output of the video processing unit 6.

  Reference numeral 8 denotes an audio processing unit subsequent to the video / audio decoder unit 5, which performs digital / analog conversion of an audio digital signal to form an audio signal. An audio output unit 9 including a speaker or the like outputs the received audio based on the audio signal from the audio processing unit 8.

  Reference numeral 10 denotes a PSIP detector, which detects PSIP of the TS received and demodulated by the reception demodulator 2. Reference numeral 11 denotes a channel detection unit subsequent to the PSIP detection unit 10, which forms the VCT presence / absence determination means of the present invention, determines whether or not VCT exists in PSIP, and determines the VCT main (Major) value and sub (Minor). ) Output V-CH information formed by the value.

  Reference numeral 12 denotes a channel preset processing unit, which has, for example, a CH-DB 13 and a flag register 14 composed of registers. Like the channel selection control unit 3, the PSIP detection unit 10, and the channel detection unit 11, the software processing of the microcomputer The stationed detection means, registration presence / absence determination means, temporary registration processing means, PMT determination means, first and second exception processing means, additional registration processing means, and main registration processing means of the present invention are formed.

  The station-detecting means is instructed to perform channel presetting by starting selection when the television receiver 1 is first turned on or selecting a function from a menu screen displayed on the screen display unit 7 by a user operation. When the tuning frequency of the reception demodulator 2 is swept in ascending or descending order via the tuning control unit 3, the reception demodulating unit 2 performs digital TV broadcasting while the tuning frequency is varied. Whether the reception demodulator 2 receives and demodulates the TS is detected based on whether or not demodulation is synchronized.

  When the power is turned on for the first time (at the first start-up), for example, a screen 7a in FIG. 6 is automatically displayed on the screen display section 7 to prompt channel presetting. By clicking the triangle marks ma and mb, the horizontal stripe mc at the center of the screen is moved up and down to match the “START” at the center, and the “SET” md at the bottom right of the screen is clicked to start the channel preset.

  Further, after that, for example, a menu selection screen 7b for various functions shown in FIG. 7 is displayed on the screen display unit 7 by a user operation, and the triangle marks ma and mb at the lower left corner of the screen 7b are clicked to display Channel presetting starts by moving the direction stripe mc up and down to “AUTO CH MEMORY” and clicking “ADJUST” me in the lower right of the screen.

  Further, during the channel preset processing, a screen 7c showing the processing in FIG. 8, for example, is displayed on the screen display unit 7, and the horizontal stripe mf of the screen 7c extends in the right direction of the screen as the channel preset progresses. Progress is displayed dynamically.

  The registration presence / absence determination means determines whether the channel detection section 11 detects the presence or absence of VCT, and determines whether the VCT has a main (Major) value and a sub (Minor). It is determined whether or not the value V-CH is already registered in the CH-DB 13.

  The temporary registration processing means determines whether the registration presence / absence determination means is unregistered. When the V-CH to be registered is not registered in the CH-DB 13, the main value of the VCT existing in the PSIP of the received demodulated TS and When the sub-value V-CH is registered in the CH-DB 13 as a preset channel and the registration presence / absence discriminating means discriminates the registration, when the V-CH to be registered is registered in the CH-DB 13, the V-CH is registered. Without registering CH in the CH-DB 13, the flag indicating that there is an unregistered channel in the flag register 14 is set.

  The PMT discriminating means is configured such that at the time of receiving and demodulating a TS for which the channel detection unit (VCT presence / absence discriminating means) 11 discriminates the absence of VCT, the PMT included in the PAT of the TS and at least P-NUM coincide with the VCT, In this embodiment, inconsistency is discriminated. In this embodiment, the PMT matches or does not match between the PMT and the VCT included therein, and the video (Audio), audio (Audio), and time information (PCR) PID match. Determine discrepancies.

  The first exception processing means sets a flag indicating that there is an unregistered channel in the flag register 14 by the coincidence determination of the PMT determination means, and sets the main value as a physical channel value corresponding to the tuning frequency by the mismatch determination of the PMT determination means. A V-CH having a sub-value of PMT of PMT is generated.

  If the V-CH generated by the first exception processing unit is not registered in the CH-DB 13, the second exception processing unit has no possibility of duplicate registration, so the V-CH is stored in the CH-DB 13. If it is registered as a preset channel and the V-CH generated by the first exception processing means is already registered in the CH-DB 13, there is a possibility of duplicate registration, so the flag register 14 is flagged with an unregistered channel. set.

  The additional registration processing means is configured to set the unregistered preset channel in which the flag of each unregistered channel is set in the flag register 14 after the variable selection of the channel selection frequency is finished and the entire channel selection range has been swept and searched. Are determined as V-CHs that do not overlap with each V-CH registered in the CH-DB 13 and additionally registered in the CH-DB 13.

  More specifically, the additional registration is performed by identifying whether the VCT V-CH of the PSIP VCT is a 1-part channel or a 2-part channel for an unregistered preset channel for which the VCT presence / absence discriminating means has VCT. The V-CH to be determined is determined as a V-CH different from the already registered V-CH of the 1-part channel and 2-part channel of the CH-DB 13. In addition, for an unregistered preset channel for which the VCT presence / absence discriminating means has no VCT, priority is given to the registration of one part channel. Therefore, if the V-CH of one part channel is registered in the CH-DB 13, additional registration is performed. The V-CH to be determined is determined as the V-CH of the next one-part channel of the largest registered one-part channel in the CH-DB 13 and if the V-CH of the one-part channel is not registered in the CH-DB 13 The V-CH to be additionally registered is determined as the V-CH of the next two-part channel of the largest registered two-part channel in the CH-DB 13.

  The main registration processing means writes and sets each V-CH temporarily registered in the CH-DB 13 in the memory 4 after the completion of the additional registration. This setting ends the channel preset. Further, when the writing to the memory 4 is completed, the CH-DB 13 is reset and cleared, and the stored contents and the like are erased.

(Operation)
Based on the above configuration, the television receiver 1 operates as shown in steps S1 to S29 of FIGS.

  That is, when the channel preset is instructed to the channel preset processing unit 12 and the channel preset is started, the station detection means operates, and the channel selection of the reception demodulation unit 2 is performed via the channel selection control unit 3 in step S1 of FIG. The frequency is set to the default frequency, and thereafter, the channel selection frequency is swept and controlled in ascending or descending order by the loop processing in steps S2 to S4 until the reception demodulator 2 receives a new digital television broadcast. Is repeated from the lower limit to the upper limit of the entire channel selection frequency range or vice versa.

  When the reception demodulator 2 receives the digital television broadcast by demodulating the channel selection frequency and demodulates the TS, the process proceeds from step S2 to step S5 in FIG. It is determined whether or not VCT exists in the PSIP of the TS.

  At this time, if VCT exists in PSIP, the process proceeds from step S5 to step S6 in FIG.

  And if it is unregistered V-CH, it will transfer to step S7 from step S6, a temporary registration process means will operate | move, and the main value and subvalue of VCT which exist in PSIP of TS received and demodulated by step S7, S8 Are registered in the CH-DB 13 as preset channels. Further, the same registration is performed for the main value and the sub-value V-CH of each VCT existing in PSIP by a loop process that returns from step S8 to steps S6 through steps S9 and S10.

  On the other hand, if it is a registered V-CH, the process proceeds from step S6 in FIG. 3 to step S11, and the temporary registration processing means sets a flag indicating that there is an unregistered channel in the flag register 14.

  And it transfers to step S3 from step S9 or step S11, and the same process is repeated about all the channel selection ranges.

  By doing so, each VCT of the VCT existing in the PSIP is temporarily registered in the CH-DB 13 as a preset channel in the CH-DB 13 except for the possibility of duplication. For a V-CH having a channel, instead of registering, a flag indicating that there is an unregistered channel for each channel in the flag register 14 is set.

  Next, in step S5 in FIG. 2, when there is no VCT in the PSIP of the received demodulated TS, the process proceeds from step S5 to step S12 in FIG.

  If PMT is included in the PAT of the received and demodulated TS, the process proceeds from step S12 to step S14 via step S17, and it is determined whether or not there is a VCT for the first PMT.

  At this time, if there is no VCT in the PMT, the process proceeds from step S14 to step S15, and a flag indicating that there is an unregistered channel for each channel in the flag register 14 is set. Thereafter, the process returns to step 14 via steps S16 and S17 until the determination is completed for all the PMTs.

  On the other hand, if the VCT exists in the PMT, the PMT discrimination means operates, and the process proceeds from step S14 to step S18.

  Then, in steps S18 and S19, the PMT matches and does not match between the PMT and the VCT, and the PID matches and does not match between the video (Video), audio (Audio), and time information (PCR). If both P-NUM and PID do not match and the PMT discriminating means discriminates, the V-CH of the PMT's VCT is invalid, so the first exception handling means operates, and steps S19 to S20 are performed. To generate a V-CH having a main value as a physical channel value corresponding to the channel selection frequency and a sub-value as a PMT of the PMT.

  Further, the second exception processing unit operates to move to step S21, and it is determined whether or not the V-CH generated by the first exception processing unit is already registered in the CH-DB 13.

  If it is unregistered, there is no possibility of duplicate registration, so the process proceeds to step S22, and the V-CH generated by the first exception processing means is registered as a preset channel in the CH-DB 13.

  In steps S18 and S19, if at least one of the P-NUM and the PID matches, the process proceeds from step S18 or step S19 to step S15 to eliminate additional registration and perform additional registration. Based on the coincidence determination, the first exception processing means sets a flag indicating that there is an unregistered channel in the flag register 14.

  Further, if the V-CH generated by the first exception processing means is already registered in the CH-DB 13, there is a possibility of duplicate registration, so that the process proceeds from step S21 to step S15 and the unregistered channel is stored in the flag register 14. Set the presence flag.

  When the above-described processing is applied to all PMTs in the PAT, the process returns from step S15 or step S22 to step S3 in FIG. 2 via step S16.

  By doing this, only the broadcasts including the V-CH that are legitimate and have no fear of duplicate registration among all the digital television broadcasts that can be received in the selected ATSC system within the channel selection range can be obtained. The CH is temporarily registered in the CH-DB 13 as a preset channel, and the flag of the unregistered channel in the flag register 14 is set without registering the remaining broadcast V-CH.

  When the search of the tuning range is completed, the process proceeds from step S3 in FIG. 2 to step S23 to sort and grasp each V-CH registered in the CH-DB 13, and then the unregistered channel in the flag register 14 On the condition that the presence flag is set, the process proceeds to step S25 via step S24, and the unregistered broadcast preset channel in which the unregistered channel presence flag is set is additionally registered.

  At this time, the additional registration processing means operates to execute the additional registration processing in steps Q1 to Q7 in FIG.

  Then, based on the determination in step Q1 of FIG. 5, with respect to the unregistered preset channel that the VCT presence / absence determination means has VCT, whether V-CH of PSIP VCT is 1 part channel or 2 part channel is determined in step Q2. Identify.

  Based on this identification, the V-CH to be additionally registered in steps Q3 and Q4 is determined to be a V-CH different from the already registered V-CH of the 1-part channel and 2-part channel of the CH-DB 13.

  Specifically, for a one-part channel, the V-CH to be additionally registered is determined as the V-CH of the next one-part channel after the largest registered one-part channel in the CH-DB 13. In the case of a two-part channel, the V-CH to be additionally registered is the main value of the V-CH included in the VCT and the maximum value of the V-CH of the two-part channel already registered in the CH-DB 13 of the main value. A V-CH of a two-part channel consisting of a sub-value + 1 sub-value is determined.

  For an unregistered preset channel for which the VCT presence / absence discriminating means has no VCT, the process shifts from step Q1 to step Q5 to give priority to the registration of one part channel. Is registered in step Q6, the V-CH to be additionally registered is determined as the V-CH of the next one-part channel of the largest registered one-part channel in the CH-DB 13, and one part is stored in the CH-DB 13. If the channel V-CH is not registered, the V-CH additionally registered in step Q7 is determined as the V-CH of the next two-part channel of the largest registered two-part channel in the CH-DB 13.

  When the V-CH to be additionally registered is determined and registered in the CH-DB 13, the process proceeds from step S25 in FIG. 2 to step S26, and the corresponding unregistered channel flag is reset, via steps S27 and S28. The same additional registration is performed for all the unregistered channels in which the flag indicating that there is an unregistered channel is set by the loop processing returning to step S24.

  By doing so, V-CH is additionally registered in the CH-DB 13 without overlapping registration for the remaining receivable broadcasts.

  When all the additional registrations are completed, the process proceeds from step S27 to step S29, where the main registration processing unit operates, and all the V-CHs temporarily registered in the CH-DB 13 are written in the memory 4. The channel preset ends. When the writing to the memory 4 is completed, the CH-DB 13 is reset and cleared, and the stored contents and the like are erased.

  Therefore, when a channel preset for ATSC digital TV broadcasting is performed, for a broadcast that lacks channel-related information or for which there is a possibility that V-CHs may be duplicated, V-CH is collectively set after the search of the tuning range is completed. Depending on the configuration to be determined, all receivable broadcasts including exceptional broadcasts in which information related to the channel is insufficient or duplicated can be appropriately channel-preset without omission and duplication.

  In addition, when VCT exists in the PSIP of the received and demodulated TS, an unregistered preset channel can be preset as an original one-part channel or two-part channel in accordance with V-CH of VCT. The channel preset performance is further improved.

  The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit thereof. For example, the control processing of the channel preset processing unit 12 Of course, the above-described procedures and the like may be different from those of the both embodiments. Specifically, for example, in step S20, the sub value may be changed from 1 to the order.

  Next, for each broadcast additionally registered in the CH-DB 13, for example, an empty V-CH that is not registered in the CH-DB 13 and is not reserved, or a preset V-CH registered in the CH-DB 13. It may be displayed on the screen display unit 7 and the user may operate from the display and specify the V-CH for additional registration. In some cases, all the V-CHs to be registered are available V The operation of -CH may be set while monitoring the display on the screen display unit 7.

  The present invention can be applied to various video processing apparatuses of an independent type and a built-in (built-in) type having a reception function of an ATSC digital television broadcast.

It is a circuit block diagram of the principal part of the television receiver in one Embodiment of this invention. 4 is a partial flowchart for explaining the operation of the channel preset of the television receiver. FIG. 10 is another partial flowchart for explaining the operation of the channel preset of the television receiver. Fig. 10 is still another partial flowchart for explaining the operation of the channel preset of the television receiver. It is a detailed flowchart of the additional registration of a television receiver same as the above. It is explanatory drawing of the screen which prompts the channel preset at the time of the first power activation of a television receiver same as the above. It is explanatory drawing of the menu screen of a television receiver same as the above. It is explanatory drawing of the screen in the channel preset of a television receiver same as the above. It is explanatory drawing of the one part data structure of the digital television broadcast of an ATSC system. It is explanatory drawing of the data structure of the other part of the digital television broadcast of ATSC system same as the above.

Explanation of symbols

2 reception demodulation unit 3 channel selection control unit 4 memory for channel preset 10 PSIP detection unit 11 channel detection unit 12 channel preset processing unit 13 channel database unit (CH-DB)
14 Flag register

Claims (4)

  In a video processing device equipped with an ATSC (Advanced Television Systems Committee) digital TV broadcast reception function, the channel selection frequency is raised and lowered according to the channel preset setting to receive and demodulate the transport stream (hereinafter referred to as TS). And a virtual channel table (Virtual Channel) in the PSIP (Program and System Information Protocol) of the TS received and demodulated every time the station detection means detects reception demodulation of the TS. Table (hereinafter referred to as “VCT”), the VCT presence / absence determining means for determining whether or not the VCT is present, and the VCT presence / absence determining means determining whether the VCT is present or not. registration presence / absence judging means for judging whether or not a virtual channel (hereinafter referred to as V-CH) having an ajor value and a sub value (minor) value is already registered in the channel database unit for temporary registration, and the presence / absence of the registration The VCT of the main value and the sub value of the VCT is registered in the channel database unit as a preset channel by the unregistered determination by the determining means, and the flag indicating that there is an unregistered channel is determined by the already registered determination of the registration presence / absence determining means. And the VCT presence / absence judging means, the VCT presence / absence judging means determines whether there is no VCT, and at least the program number of VCT and PMT existing in the TS program map table (hereinafter referred to as PMT). (Program Number (Hereinafter referred to as P-NUM) PMT discriminating means for discriminating coincidence / non-coincidence, a flag indicating that there is an unregistered channel is set by coincidence discrimination of the PMT discrimination means, and a main value is selected by discriminating discrimination of the PMT discrimination means. A first exception processing unit for generating a V-CH having a physical channel value corresponding to a station frequency and a sub-value of P-NUM of the PMT, and the V-CH generated by the first exception processing unit is the channel If not registered in the database unit, the V-CH is registered as a preset channel in the channel database unit, and if the V-CH generated by the first exception processing unit is already registered in the channel database unit. Unregistered due to the second exception processing means to set the flag for unregistered channel and the end of variable tuning frequency An additional registration processing means for determining an unregistered preset channel with a channel flag set as a V-CH that does not overlap with each V-CH registered in the channel database unit, and additionally registering it in the channel database unit; A video processing apparatus comprising: main registration processing means for writing and setting each V-CH temporarily registered in the channel database unit in a channel preset memory after completion of the additional registration.   The additional registration means identifies whether the VCT of the PSIP VCT is a one-part channel or a two-part channel for an unregistered preset channel that the VCT presence / absence judgment means has VCT, and based on the identification, 2. The video processing apparatus according to claim 1, wherein a V-CH different from the registered V-CH of each of the 1 part channel and the 2 part channel of the channel database unit is determined and additionally registered in the channel database unit.   In a channel preset method of an image processing apparatus having a reception function of an advanced television systems committee (ATSC) system, a channel stream is set up and down according to a channel preset setting, and a transport stream (hereinafter referred to as TS) is selected. ) Is received and demodulated, it is determined whether a virtual channel table (hereinafter referred to as VCT) exists in PSIP (Program and System Information Protocol) of the received and demodulated TS. When the VCT exists, a virtual channel (Virtual Chan) of the main (Major) value and the sub (Minor) value of the VCT exists. el) (hereinafter referred to as V-CH) is determined whether or not it is already registered in the channel database section for temporary registration. If it is not registered, the V-CH of the VCT main value and sub value is preset as a channel. If it is registered in the channel database part and is already registered, a flag indicating that there is an unregistered channel is set. If there is no VCT in PSIP, a TS program map table (hereinafter referred to as PMT) is set. The at least program number (Program Number) (hereinafter referred to as “P-NUM”) of VCT and PMT existing in FIG. 1 is discriminated, and when P-NUM matches, the flag indicating that there is an unregistered channel is set. -When NUM does not match, the main value is the physical channel corresponding to the selected frequency. If the generated V-CH is not registered in the channel database unit, the V-CH is preset as a channel to be preset in the channel database unit. If the registered and generated V-CH is already registered in the channel database unit, a flag indicating that there is an unregistered channel is set. A preset channel to be registered is determined as a V-CH that does not overlap with each V-CH registered in the channel database unit, and is additionally registered in the channel database unit. After completion of the additional registration, the channel database unit temporarily stores the channel. Write and set each registered V-CH in channel preset memory A channel preset method for a video processing apparatus.   For unregistered preset channels with VCT, whether PSIP VCT V-CH is 1-part channel or 2-part channel is identified, and based on the identification, 1-part channel and 2-part channel of the channel database section respectively. 4. A channel preset method for a video processing apparatus according to claim 3, wherein a V-CH different from the previously registered V-CH is determined and additionally registered in the channel database unit.

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