JP2007295421A5

JP2007295421A5 -

Info

Publication number: JP2007295421A5
Application number: JP2006122825A
Authority: JP
Filing date: 2006-04-27
Publication date: 2009-03-12
Anticipated expiration: 2026-04-27

Claims

A receiver that receives the multiplexed transmission stream;
A separation unit for separating a video basic stream from a transmission stream in the reception unit;
A buffer memory for storing the video basic stream;
A frame detection unit for detecting head data of a frame in the video basic stream stored in the buffer memory;
When the frame detection unit detects the top data of the frame, a dummy data insertion unit for inserting dummy data until the buffer memory is full,
When the buffer memory is full, a DMA transfer unit that reads the video basic stream from the buffer memory;
A data receiving apparatus comprising: a video decoding unit that performs a decoding process on the video basic stream transferred by the DMA transfer unit.

A receiver that receives the multiplexed transmission stream;
A separation unit for separating an audio basic stream from a transmission stream at the reception unit;
A buffer memory for storing the audio basic stream;
A frame detection unit for detecting head data of a frame in the audio basic stream stored in the buffer memory;
When the frame detection unit detects the top data of the frame, a dummy data insertion unit that inserts dummy data until the buffer memory is full,
When the buffer memory is full, a DMA transfer unit that reads the audio basic stream from the buffer memory;
A data receiving apparatus comprising: an audio decoding unit that performs a decoding process on the audio basic stream transferred by the DMA transfer unit.

The data receiving device according to claim 1 or 2,
A bit rate calculation unit for calculating a bit rate of the video basic stream or the audio basic stream stored in the buffer memory;
The dummy data insertion unit does not insert the dummy data when the bit rate calculated by the bit rate calculation unit is equal to or greater than a preset threshold value.

A receiver that receives the multiplexed transmission stream;
A separation unit that separates the video basic stream and the audio basic stream from the transmission stream in the reception unit;
A video buffer memory for storing the video basic stream;
An audio buffer memory for storing the audio basic stream;
A video frame detector for detecting head data of a frame in the video basic stream stored in the video buffer memory;
An audio frame detection unit for detecting head data of a frame in the audio basic stream stored in the audio buffer memory;
A video dummy data insertion unit that inserts dummy data until the video buffer memory is full when the video frame detection unit detects leading data of a frame in the video basic stream;
An audio dummy data insertion unit for inserting dummy data until the audio buffer memory is full when the audio frame detection unit detects the top data of a frame in the audio basic stream;
When the video buffer memory is full, a video DMA transfer unit that reads the video basic stream from the video buffer memory;
When the audio buffer memory is full, an audio DMA transfer unit that reads the audio basic stream from the audio buffer memory;
A video decoding unit that performs a decoding process on the video basic stream transferred by the video DMA transfer unit;
A data receiving apparatus comprising: an audio decoding unit that performs decoding processing on the audio basic stream transferred by the audio DMA transfer unit.

The data receiving device according to claim 4, wherein
A video bit rate calculation unit for calculating the bit rate of the video elementary stream stored in the video buffer memory, and an audio bit rate calculation unit for calculating the bit rate of the audio elementary stream stored in the audio buffer memory Prepared,
The video dummy data insertion unit and the audio dummy data insertion unit are configured to detect the dummy data when the bit rates calculated by the video bit rate calculation unit and the audio bit rate calculation unit are greater than or equal to a preset threshold value, respectively. A data receiving apparatus characterized by not inserting a signal.

In the data receiver of any one of Claims 1-5,
The data receiving apparatus according to claim 1, wherein the dummy data is stuffing data for adjusting a bit rate.

In the data receiver of any one of Claims 1-5,
The data receiving apparatus according to claim 1, wherein the dummy data is user data.

The data receiving device according to claim 7,
The data receiving apparatus, wherein the user data includes display time information.

The data receiving device according to claim 7 or 8,
The data decoding device, wherein the video decoding unit and the audio decoding unit decode the user data separately from the demodulation of the video basic stream or the audio basic stream.

A computer-readable storage medium,
The computer,
Receiving means for receiving a multiplexed transmission stream including a video elementary stream and an audio elementary stream;
Storage means for storing the video basic stream in a video buffer memory and storing the audio basic stream in an audio buffer memory;
Video frame detection means for detecting head data of a frame in the video basic stream stored in the video buffer memory;
Audio frame detection means for detecting start data of a frame in the audio basic stream stored in the audio buffer memory;
Video dummy data insertion means for inserting dummy data into the frame when the video frame detection means detects leading data of a frame in the video basic stream;
Audio dummy data insertion means for inserting dummy data into the frame when the audio frame detection means detects leading data of a frame in the audio basic stream;
When the video buffer memory is full, video DMA transfer means for reading the video basic stream from the video buffer memory;
When the audio buffer memory is full, audio DMA transfer means for reading the audio basic stream from the audio buffer memory;
Video decoding means for performing decoding processing on the video basic stream transferred by the video DMA transfer means;
A computer-readable storage medium having recorded thereon a program for causing the basic audio stream transferred by the audio DMA transfer means to function as audio decoding means for performing decoding processing.