Abstract: A method and apparatus is provided for the delivery of digital television and interactive broadband service in a manner that maximizes the usage of the digital broadcast spectrum. A digital television signal is transmitted to a given broadcast area in a relatively small part (for example, a 1 MHz band) of one or more licensed portions of the digital broadcast spectrum. Interactive broadband service is delivered within at least a portion of the same broadcast area covered by the broadcast digital television signal, in the remainder (for example, a 5 MHz band) of an unused part of the same licensed portion of the digital broadcast spectrum as is occupied by the digital television signal, or within an unlicensed (unused) portion of the digital broadcast spectrum. The broadcasting of the digital television and delivery the interactive broadband service occur simultaneously. In one embodiment, digital television and broadband service are delivered by the same equipment within the same bandwidth.

Abstract: A method and apparatus for an adaptive bit rate system (300) that includes a media segmenter (304). The media segmenter divides a streaming media content into a plurality of variable duration segments wherein a first of the plurality of variable duration segments has a duration different from a second of the plurality of variable duration segments so that one of the plurality of variable duration segments ends at a determined discontinuity in the streaming media content. The system also can include an encoder (302) for encoding the variable duration segments of the streaming media content. In addition, the system includes an adaptive bit rate server (306) for storing and transmitting the variable duration segments of the streaming media content.

Abstract: Methods and systems for enabling and performing secured, single action payments from a mobile device are disclosed. One method includes receiving user credentials at an application installed on a mobile device, and transmitting the user credentials from the mobile device to a server alongside a device identifier. The method includes receiving data at least partially defining encrypted personal payment information and saving the encrypted personal payment information in a memory of the mobile device in association with the application. At least prior to receiving a user request to make a payment via the application, the mobile device lacks a decryption key capable of decrypting the encrypted personal payment information.

Abstract: A network array (100) comprises a first network (101) having a plurality of first nodes (103, 104, 109), comprises a second network (102) having a plurality of second nodes (106, 109), and comprises a forwarder node (109). The forwarder node (109) constitutes one of the first nodes (103, 104, 109) and constitutes one of the second nodes (106, 109) to form a communication interface between the first network (101) and the second network (102). The forwarder node (109) has an implemented data transmission scheduling management function capable of distinguishing between data to be transmitted between the first network (101) and the second network (102) and data to be transmitted within the first network (101) or within the second network (102). The forwarder node (109) is adapted to communicate with the first network (101) using a first operation frequency and is adapted to communicate with the second network (102) using a second operation frequency which is different from the first operation frequency.

Abstract: A method for performing channel shortening equalization with frequency notch mitigation is provided, where the method is applied to an electronic device. The method includes: obtaining channel response information from channel estimation to determine a relaxed channel convolution matrix corresponding to the channel response information, with the relaxed channel convolution matrix being a partial matrix of a channel convolution matrix corresponding to the channel response information, wherein the relaxed channel convolution matrix is obtained from omitting a portion of matrix elements of the channel convolution matrix; and based upon the relaxed channel convolution matrix, jointly performing time domain channel shortening control and frequency domain flatness control over the TEQ to perform channel shortening equalization with frequency notch mitigation by utilizing the TEQ. In particular, the portion of matrix elements includes a plurality of rows of matrix elements within the channel convolution matrix.

Abstract: The proposed Advanced Messaging Solution (AMS) provides a non-intrusive cloud-based software application infrastructure through which MSOs and Service Providers can unify Web, mobile and set-top box device technologies with Enterprise and 3rd party services, as well as Web/Internet Applications.

Abstract: A method and apparatus is disclosed in which delay is applied to analog-sourced audio in a radio simulcast when the analog signal initially leads the digital signal. A radio receiver is configured to receive a simulcast radio program broadcast with an analog signal and a digital signal. The program content can be extracted from either the analog or digital signals, with the audio source eventually being blended to the digital signal. Audio is initially provided based on the analog signal. If the analog signal is initially leading the digital signal, delay is applied a data stream corresponding to the analog signal relative to a data stream corresponding to the digital signal. Delay applied to the data stream corresponding to the analog signal is increased at a rate that avoids audio artifacts of the output audio. The blend is performed when the data streams are aligned in time.

Abstract: Data communications systems and methods comprise a conductive media infrastructure in communication with a baseband data universe propagating at least one first signal and a broadband data universe propagating at least one second signal. At least one segmentation device is in communication with the conductive media infrastructure and partitions the broadband data universe from the baseband data universe. A coupling device is in communication with the at least one segmentation device and modulates transmission parameters of the second signal such that information travels within the broadband data universe via the conductive media infrastructure and avoids the baseband data universe. Power distribution and management systems and methods are also provided which preserve power distribution via a baseband data universe while one or more devices communicate energy data via a broadband data universe.

Abstract: A method, system, and medium are provided for delivering broadcast video content at varying levels of video quality. In particular, a source video stream is provided that is divided into two or more video substreams such that the video substreams include offset frames from the source video stream. The video substreams are modulated onto one or more air interface channels. Mobile devices may be configured to access only one of the video substreams to present video content at a lower frame rate or to access multiple video substreams to present video content at a higher frame rate.

Abstract: The present technology relates to a signal processing device, a signal processing method, and a program capable of appropriately demodulating a desired signal from a multiplexed signal obtained by multiplexing a plurality of signals. A preamble signal is detected from a multiplexed signal obtained by multiplexing a plurality of signals. When information for discriminating each of the signals that is contained in the preamble signal indicates a first signal, demodulation by a demodulator is continued and the first signal is demodulated. When information for discriminating each of the signals that is contained in the preamble signal indicates a second signal, demodulation is not performed by stopping the demodulation by the demodulator. The present technology can be applied to a signal processing device that processes signals for digital broadcasting.

Abstract: According to one exemplary embodiment, a front-end system for processing a composite wideband signal comprises a pre-receiving unit including a multiplexer for separating the composite wideband signal into a plurality of filtered signals. The front-end system further comprises a plurality of discrete frequency band outputs corresponding to the plurality of filtered signals, and a tuner/down-converter coupled to at least one of the plurality of discrete frequency band outputs. In one embodiment, the pre-receiving unit of the front-end system further comprises a second multiplexer for separating at least one of the plurality of filtered signals into a second plurality of filtered signals. In one embodiment, the pre-receiving unit may further comprise a low noise amplifier for processing at least one of the plurality of filtered signals before it is input to the second multiplexer.

Abstract: A first node sends a first message to a second node. The second node sends a second message to the first node. A first elapsed time is measured from the beginning of the transmission of the first message to the beginning of receipt of the second message. A second elapsed time is measured from the beginning of the receipt of the first message to the beginning of the transmission of the second message. The second node sends a third message to the first node containing the second elapsed time. The distance between the first and second node is calculated based on these elapsed times and a calibration count multiplier contained in the second or third message. A node may be moved within a wireless mesh network. Positional information about the node and distances to its neighbors is determined and transmitted to the network manager where it is stored.

Abstract: An apparatus for synchronizing audio data and visual data and a method therefor are provided. The apparatus includes a splitter, a synchronization unit coupled to the splitter, an audio control unit coupled to the splitter and the synchronization unit, and a visual data processing unit coupled to the splitter and the synchronization unit. The splitter receives an application layer data frame including audio data and visual data and splits the visual data from the audio data. The synchronization unit receives audio timing information of the audio data and acquires synchronization information according to the audio timing information and external timing information. The audio control unit receives and temporarily stores the audio data and outputs the audio data according to the synchronization information. The visual data processing unit analyzes and temporarily stores the visual data and outputs the visual data together with the audio data according to the synchronization information.

Abstract: A digital broadcasting system and method of processing data are disclosed. Herein, a method of processing data in a transmitting system includes creating a data group including a plurality of mobile service data packets, re-adjusting a relative position of at least one main service data packet of a main service data section, the main service data section including a plurality of main service data packets, and multiplexing the mobile service data of the data group and the main service data of the main service data section in burst units. Herein, a position of an audio data packet among the main service data packets of the main service data section may be re-adjusted. Also, a position of an audio data packet included in the main service data section may be re-adjusted based upon a multiplexing position of the main service data section.

Abstract: Described are computer-based methods and apparatuses, including computer program products, for efficiently storing transport streams. A first sequence of one or more packets associated with the first transport stream is received, the first sequence comprising one or more data packets. A storage packet is generated by selecting one or more packets from the first sequence, the storage packet comprising a packet header and the one or more data packets. One or more null packet insertion locations are identified in a second sequence of one or more packets associated with a second transport stream. Null packet insertion information is generated based on the one or more null packet insertion locations, the information including data indicative of a reconstruction parameter related to reconstructing the second sequence from the storage packet by inserting one or more null packets that are not stored in the storage packet, wherein the packet header includes the null packet insertion information.

Abstract: Methods and apparatus for selecting digital (network) interface technology for programming and data delivery over, e.g., a content-based network. In one embodiment, the network comprises an HFC cable or satellite network that includes a server process interfacing with a plurality of customer premises equipment (CPE), and/or associated client devices, each having different capabilities profiles. The server determines the one or more capabilities possessed by the CPE, and evaluates one or more program or content choices for possible delivery to that CPE based on its profile. The server generates a list of programs or content based on this evaluation, and transmits this list to the CPE, which displays the list for viewing by a user. The user is therefore offered a list of available content that is compatible with their specific configuration.

Abstract: A method of aggregating a plurality of packet based communication channels is provided by the system. The communication channels connect two common endpoints, and aggregation devices are present at each point to implement an aggregation policy. The system provides a dynamic aggregation system where an aggregation policy is employed on a per packet flow basis. Packet flow can be classified by application type, so that an appropriate aggregation policy can be used for packets belonging to the flow. The selected aggregation policy is used for each flow within the aggregation devices at each endpoint.

Abstract: Disclosed is a wireless receiving apparatus, whereby inter-antenna interference can be reduced without inducing an increase of a mounting area due to an increase of the number of antennas, and the number of RFIC input terminals, circuit scale and power consumption can be reduced. In the wireless receiving apparatus (100), when a receiving antenna (110-1) and a down-converter (130) are connected with a multiplexer (120) therebetween, a capacity control unit (190-2) controls the capacity value of the capacity-variable parasitic element (180-2) connected to the receiving antenna (110-2) such that the communication capacity of the receiving antenna (110-1) is maximum.

Abstract: A method for presenting information contained in messages in a terminal (MS). In the method, the message includes at least one component. The message is transmitted to a terminal (MS) in a system for transmitting multimedia messages. In the method, a presentation model (SMIL) is formed to contain information related to the presentation of each component attached in the message. The aforementioned presentation model (SMIL) is supplemented with a reference about the location of each component in the message, and the aforementioned presentation model (SMIL) is attached to the aforementioned message.

Abstract: A proxy in a cable modem termination system receives IP packets having an address associated with set top box out of band messages. The proxy encapsulates the packets in an Ethernet frame containing an Ethernet address. A cable modem associated with the set top box is preconfigured to detect the Ethernet encapsulated packets and pass the out of band messages in the packets to the set top box.

Abstract: A wireless communications network includes roving subscriber-stations and base stations receiving broadcast programs from a content server. A subscriber-station evaluates whether a desired program is available from a subject base station. According to this evaluation, the subscriber-station takes steps to (1) receive the desired program on a shared channel for reception by multiple subscriber-stations, or (2) initiate base station delivery of the desired program to the subscriber-station on an individual channel. Responsive to a message from a subject subscriber-station identifying a desired program, a base station either (1) continues transmitting the desired program upon a shared channel, (2) starts transmitting the desired program on a shared channel, or (3) sends the subject subscriber-station a channel assignment message and commences transmission of the desired program on the assigned individual channel.

Abstract: A system, and related methodology, are provided that are configured to receive, at a first network element such as a Universal Edge Quadrature Amplitude Modulator (UEQAM), multiple channels of data delivered as respective streams of packets, form a packet switched communication frame including a sub-layer header, encapsulate packets from the respective multiple channels into a payload field of the packet switched communication frame, identify the packets encapsulated in the payload field with respective tags in the sub-layer header, and transmit the packet switched communication frame to a second network element such as a Downstream Physical (DS-PHY) entity where the individual packets are recovered and mapped to selected respective stream processing resources based on respective tags.

Abstract: At one of the timings: during a period between the moment when one of terminals which performs transmission calls out a communication partner and the moment of response and at the timing after the communication between the terminals is complete; content data is read out from a database and the read out content data is converted according to conversion information based on reproduction at the terminal. The converted content data is transmitted to the terminal.

Abstract: The present invention provides a Web based unified communication system and method, and Web based communication manger. In the present invention, generating a SMIL document, based on a communication request from a terminal, for starting and controlling a communication session between the terminal and corresponding terminals, and controlling the terminals and communication channels involved in the communication session to work collectively so as to perform the communication session by interpreting and executing the SMIL document. In the invention, instead of being a kind of supplementation, the Web technique should become the core technique of such systems. Further, in the invention, terminal may be a set of user devices, the set of user devices includes one or more devices, each of said devices provides media interaction capabilities for one or more communication channels, and each of said devices is mapped to one or more media objects in said SMIL document.

Abstract: Techniques for performing joint time-frequency automatic gain control (AGC) by a receiver are described. In an aspect, the receiver may transform time-domain samples with a fast Fourier transform (FFT) to obtain frequency-domain symbols and may detect for saturation of the frequency-domain symbols. The receiver may adjust a gain based on whether saturation is detected and may apply the gain prior to the FFT. In one design, the receiver may use a nominal value for a setpoint if saturation is not detected and may reduce the setpoint if saturation is detected. The receiver may adjust the gain based on the setpoint, which may determine the average power of the time-domain samples. In another design, the receiver may determine the gain based on a gain offset and may vary the gain offset based on whether saturation is detected. For both designs, the receiver may apply the gain on digital samples and/or an analog signal prior to the FFT.

Abstract: A receiver of network data dynamically filters packets by packet type from a network device CPU based on usage information, such as time, day, location, and feature (e.g., “video” or “application”) selection.

Abstract: An apparatus for transporting digital multimedia receives signals for a plurality of single program transport streams (SPTS). Each SPTS is transmitted as a series of groups of a predefined number of transport stream packets. An input buffer that receives the packets is configured to hold only the predefined number of packets at any point in time. A table builder receives packets from the input buffer and assigns a set of unique packet identifiers to the packets from each SPTS, reconfigures each program map table in the packets, and generates a program association table for a multiple program transport stream (MPTS). The table builder retains unaltered the program clock reference in the data packets. A first-in, first-out buffer combines packets received from the table builder into a MPTS. An output stage modulates a carrier signal, such as for a television channel, with the MPTS.

Abstract: A digital broadcasting system and method, where the digital broadcasting system includes: a transmission stream generator multiplexing a normal stream and a turbo stream to generate a dual transmission stream; a transmitter inserting an supplementary reference signal (SRS) into the dual transmission stream, processing the turbo stream to reconstitute the dual transmission stream, and outputting the reconstituted dual transmission stream; and a receiver receiving the reconstituted dual transmission stream, separately turbo decoding the turbo stream, inserting the turbo decode turbo stream into the dual transmission stream, and decoding the dual transmission stream into which the turbo decoded turbo stream has been inserted, to restore normal stream data and turbo stream data. Thus, reception sensitivity of a digital broadcasting signal can be efficiently improved.

Abstract: A system for multicast streaming of programs over a packet network includes a node having a processor that conditions a video bitstream such that packets containing an I-frame are located near program specific information (PSI) packets, the processor marking a random join point (RJP) in the video bitstream immediately preceding the I-frame and PSI packets, the node outputting the conditioned and marked video bitstream across the packet network. An edge device of the network includes a buffer that caches packets of the conditioned and marked video bitstream video starting at the RJP, and sends the cached packets to a client receiver.

Abstract: A method of generating a file at a header metadata creator apparatus, the method including: generating, at the header metadata creator apparatus, a file, the file including: a file header, a file body, and a file footer, wherein the file header includes at least KLV encoded header metadata, the KLV encoded header metadata including at least a universal label, length data and variable length data, the variable length data including a plurality of KLV encoded metadata sets, each one of the KLV encoded metadata sets includes a predetermined universal label, essence length data and a plurality of KLV encoded metadata items, and each KLV encoded metadata item includes at least an item universal label, variable item length data and item value data.

Abstract: Systems, methods, and apparatus for providing broadband communication are described. A service gateway may be situated outside of one or more households. The service gateway may include a termination component and a broadband modem. The termination component may be configured to connect to a source of a broadband data signal and receive the signal from the source. The broadband modem may be configured to receive the signal from the termination component and output at least a portion of the signal for receipt by a remote device situated within a household. Additionally, the service gateway may optionally include a router in communication with the broadband modem. The router may be configured to function as an intermediary between the modem and the remote device.

Abstract: At one of the timings: during a period between the moment when one of terminals which performs transmission calls out a communication partner and the moment of response and at the timing after the communication between the terminals is complete; a server reads out content data from a database, converts the read out content data according to the conversion information based on reproduction at the terminal, and transmits the converted content data to the terminal. At this timing, the terminal reproduces the content data transmitted from the server.

Abstract: A DTV transmitting system includes two pre-processors. The first pre-processor codes high-priority enhanced data for forward error correction (FEC) and expands the FEC-coded data. The second pre-processor codes low-priority enhanced data for FEC and expands the FEC-coded low-priority enhanced data. The DTV transmitting system further includes a data formatter generating enhanced data packets including the pre-processed data, a multiplexer multiplexing the enhanced data packets with main data packets, an RS encoder RS-coding the multiplexed data packets, a data interleaves interleaving the RS-coded data packets, and a block processor which codes each block of enhanced data in the interleaved enhanced data packets and bypasses the interleaved main data packets.

Abstract: A digital broadcasting system and method, where the digital broadcasting system includes: a transmission stream generator multiplexing a normal stream and a turbo stream to generate a dual transmission stream; a transmitter inserting an supplementary reference signal (SRS) into the dual transmission stream, processing the turbo stream to reconstitute the dual transmission stream, and outputting the reconstituted dual transmission stream; and a receiver receiving the reconstituted dual transmission stream, separately turbo decoding the turbo stream, inserting the turbo decode turbo stream into the dual transmission stream, and decoding the dual transmission stream into which the turbo decoded turbo stream has been inserted, to restore normal stream data and turbo stream data. Thus, reception sensitivity of a digital broadcasting signal can be efficiently improved.

Abstract: The present invention is a method and system for extracting messages from a person using the body features presented by a user. The present invention captures a set of images and extracts a first set of body features, along with a set of contexts, and a set of meanings. From the first set of body features, the set of contexts, and the set of meanings, the present invention generates a set of words corresponding to the message that the person is attempting to convey. The present invention can also use the body features of the person in addition to the voice of the person to further improve the accuracy of extracting the person's message.

Abstract: A method to audio matrix encode/decode, which encode and decode audio signals of two or more channels into an audio signal of one or more channel while preserving the direction of a sound image includes extracting pieces of sound image information from audio signals of multi channels, encoding and allocating the extracted sound image information to an inaudible frequency domain except an audible frequency domain, and adding the sound image information allocated to the inaudible frequency domain and matrix-encoded stereo signals of the audible frequency domain.

Abstract: A modem for use in Digital Subscriber Line communications transmits and receives data over the local subscriber loop in common with voice information over the loop, while avoiding the need for voice/data splitters. The modem responds to disruptions associated with “disturbance events” such as on-hook to off-hook transitions and the like by rapidly switching between pre-stored channel parameter control sets defining communications over the loop under varying conditions. In addition to changing parameter control sets responsive to a disturbance event, the modem may also change transmission power levels and other system parameters such as frequency domain equalizer characteristics. Further, provisions are made for reduced bandwidth communications under selected conditions.

Abstract: Provided is apparatus and method for transforming cable channel. The apparatus includes a data mixing unit for receiving and mixing a band data and a first broadband data, to thereby generate a second broadband data of a broadband cable channel, and a channel adapting unit for dividing a band data from the second broadband data received through the broadband cable channel, bypassing the second broadband data to a first subscriber apparatus and transmitting the band data to a second subscriber apparatus.

Abstract: Systems and methods for point-to-multipoint communications with CAS are provided. In one embodiment, a line unit comprises: an interface to communicate with a node using a first frame structure comprising timeslots, the frame structure transporting signaling bits in an x'th timeslot; the unit coupled another line unit via a communication link, wherein the other unit communicates with another network node using a second frame structure comprising timeslots, the second frame structure transporting signaling bits via its x'th timeslot. Payload timeslots for a first frame received from the other line unit are mapped from the second frame structure to payload timeslots of a second frame using the first frame structure and transmitted via the interface. The x'th timeslot for each of the first and second frame structures are formatted in a multiframe structure comprising a schedule of signaling bit locations allocated to signaling bits corresponding to a designated payload timeslot.

Abstract: The present invention is directed to a digital broadcast system and a data processing method. A broadcast signal in which mobile service data and main service data are multiplexed is transmitted and received. Then, in a broadcasting receiver, the program table information describing channel information and event information of the mobile service data according to an identifier of an ensemble in which the mobile service data are multiplexed, in the received broadcast signal. And the mobile service data is outputted by using the parsed program table information.

Abstract: According to one exemplary embodiment, a front-end system for processing a composite wideband signal comprises a pre-receiving unit including a multiplexer for separating the composite wideband signal into a plurality of filtered signals. The front-end system further comprises a plurality of discrete frequency band outputs corresponding to the plurality of filtered signals, and a tuner/down-converter coupled to at least one of the plurality of discrete frequency band outputs. In one embodiment, the pre-receiving unit of the front-end system further comprises a second multiplexer for separating at least one of the plurality of filtered signals into a second plurality of filtered signals. In one embodiment, the pre-receiving unit may further comprise a low noise amplifier for processing at least one of the plurality of filtered signals before it is input to the second multiplexer.

Abstract: A digital broadcasting system and method, where the digital broadcasting system includes: a transmission stream generator multiplexing a normal stream and a turbo stream to generate a dual transmission stream; a transmitter inserting an supplementary reference signal (SRS) into the dual transmission stream, processing the turbo stream to reconstitute the dual transmission stream, and outputting the reconstituted dual transmission stream; and a receiver receiving the reconstituted dual transmission stream, separately turbo decoding the turbo stream, inserting the turbo decode turbo stream into the dual transmission stream, and decoding the dual transmission stream into which the turbo decoded turbo stream has been inserted, to restore normal stream data and turbo stream data. Thus, reception sensitivity of a digital broadcasting signal can be efficiently improved.

Abstract: The present invention provides a facility management platform to monitor and view the status of a plurality of individually addressable downstream devices including, but not limited to, addressable terminals, IRG's, settops, cable modems, taps, nodes, and/or hubs at a network control center. The FMP may display problems at these downstream devices, for example, power loss, and/or may automatically notify the appropriate companies and/or personnel to correct the problem.

Abstract: MPEG video encoders and MPEG audio encoders encode video signals and audio signals, respectively. An SI/EPG data generator generates program information. A transport stream multiplexer multiplexes the program information with video data and audio data. A system controller controls the data output rates of the encoding operations and the multiplexing ratio.

Abstract: The invention relates to a method for presenting information contained in messages in a terminal (MS). In the method, the message comprises at least one component. The message is transmitted to a terminal (MS) in a system for transmitting multimedia messages. In the method, a presentation model (SMIL) is formed to contain information related to the presentation of each component attached in the message. Said presentation model (SMIL) is supplemented with a reference about the location of each component in the message, and said presentation model (SMIL) is attached to said message.

Abstract: A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.

Abstract: Method and apparatus for distributing a content stream from a headend to a subscriber terminal is described. In one example, the content stream is processed at the headend to generate a sequence of instances having successively staggered reference frames. A request for the content streams is received from the subscriber terminal at an initial time. In response to the request, an instance from the sequence of instances having the first reference frame after the initial time is selected. The selected instance is transmitted towards the subscriber terminal.

Abstract: A display apparatus includes a display; a receiver which receives a broadcasting signal including a program with a data format; an image processing part which processes the received program according to an available data format; and a controller which controls the image processing part to display a message informing that both data formats are not matched on the display if the data format of the received program is not matched with the available data format to be processed by the image processing part.

Abstract: An original blanking period of a video signal is shortened to a set blanking period, and audio data is multiplexed into a resulting superimposing period. Table distinguishing data indicating the length of the superimposing period is inserted into the period as a blanking signal. With this configuration, it is possible to enable transmission and reception of an audio signal in a system capable of transmitting and receiving a video signal.

Abstract: An original blanking period of a video signal is shortened to a set blanking period, and audio data is multiplexed into a resulting superimposing period. Table distinguishing data indicating the length of the superimposing period is inserted into the period as a blanking signal. With this configuration, it is possible to enable transmission and reception of an audio signal in a system capable of transmitting and receiving a video signal.