Method for adjusting data transmission sample rate and device thereof

An adjustment method and an adjustment device technology, which are applied in the direction of selective content distribution, color TV parts, TV system parts, etc., can solve problems such as broken sound or audio and video cannot be synchronized, and achieve the effect of ensuring normal playback

Active Publication Date: 2013-07-24
VIMICRO ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention overcomes the problem of broken sound or audio and video cannot be synchronized in the traditional PCTV system, and provides a method and device for adjusting the sampling rate of data transmission

Method used

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  • Method for adjusting data transmission sample rate and device thereof
  • Method for adjusting data transmission sample rate and device thereof

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Embodiment Construction

[0016] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The specific embodiment of the present invention takes the PCTV card to adjust the audio data sampling rate sent to the sound card as an example, the sound card reads the audio data from the audio data buffer memory in direct-x and plays it with a fixed playback sampling rate, and the driver detects the direct The size of the audio data buffer memory in -x adjusts the rate of reading audio data from the USB data receiving buffer memory, and the PCTV card quickly adjusts the audio data of the PCTV card in real time by judging the empty / full status of the USB data receiving buffer memory Send the sample rate to ensure the normal playback of the sound card.

[0018] The method for adjusting the audio data sending sampling rate of the PCTV card includes two steps. The first step is that the PCTV card gene...

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Abstract

The invention provides a method for adjusting data transmission sample rate and a device thereof. The method comprises the following steps: received data receives status signals of a buffer memory, if the status signals indicate that the data receiving buffer memory is in an empty / full state, fine-adjustment amount is adjusted and output, if the status signals indicate that the data receiving buffer memory is not in an empty / full state and the previous one or the previous plural status signals indicate that the data receiving buffer memory is in an empty / full state, then callback is carried out and the fine-adjustment amount is output; sample rate is transmitted according to the fine-adjustment amount yield data, the data transmission sample rate is used to sample data and transmit the data to the data receiving buffer memory. The invention is applied to dynamic regulation of data transmission sample rate by a sending terminal in the case of frequency difference between the sending terminal and a receiving terminal, thus realizing dynamic balance between data sending of the sending terminal and data processing of the receiving terminal.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a method and device for adjusting the sampling rate of data transmission. Background technique [0002] PCTV is a TV card / video capture card, which can realize the functions of TV on a PC (person computer, personal computer), and even edit and process audio and video while watching. In PCTV and its related products, the audio and video data is transmitted from the PCTV card to the PC through the serial or parallel interface, through the USB (Universal Serial Bus) interface, and then received and processed by the drvier (driver) of the PCTV card, and then transmitted to the direct -x is transmitted to the sound card of the PC, and direct-x is an application program interface. After the sound card receives the data, it performs sampling and analog-to-digital conversion according to the pre-configured sampling rate to realize the playback of analog sound. The traditional PCTV card ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/41H04N5/60G06F3/16H04N5/44
Inventor 尹宝林
Owner VIMICRO ELECTRONICS CORP
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